Archive for ◊ 2009 ◊

What’s That File? An Introduction to File Extensions
Sunday, December 20th, 2009 | Author: plt

In an effort to be “user-friendly,” Windows (and perhaps some other operating systems) hides the most important part of a file name from new computer users: the extension. Okay – we’re assuming that the reasoning behind hiding extensions is a “user-friendly” one because we just can’t come up with any other reason for hiding them. No harm could ever come from seeing an extension, but plenty could be learned from it. Fortunately you have this article to guide you through some of the most common extensions that you’ll run into.

But before you can see file extensions, you need to turn them on. From Windows Explorer, click on the “Tools” menu, and select “File Options.” Click the “View” tab and then uncheck the box next to “Hide file extensions for known file types.” Click “OK” and you’ll notice that the files in Windows Explorer show a dot and group of three letters after their names. That dot and group of three letters is known as an “extension,” and the extension explains what kind of file it is.

A file could be a plain text file, an image, a sound, a video, or program. But without seeing the extension, you wouldn’t know it unless you double-clicked on it. The following list defines some of the most common extensions that you’ll find on your computer.

.au – This extension indicates a sound file. Most sound players will load up and play this kind of file.

.art – This extension indicates an image file that was compressed with AOL (America Online) technology. Both Internet Explorer and the AOL service software can display this kind of file, however if you don’t have AOL installed on your system, Internet Explorer will display it.

.avi – This extension indicates a video file playable by most multimedia viewers including Microsoft’s Media Player.

.bmp – This extension indicates another image file that might have originated from Windows Paint program.

.dll – This extension indicates a Dynamic Link Library which may contain additional programming code for software. Many different programs often share Dynamic Link Libraries and you’ll find a bunch of them in the Windows/System directory (but don’t ever delete them)!

.exe – This extension indicates a program or an application like Microsoft Word, Internet Explorer, or Outlook Express. Use extreme caution when downloading .exe files from the Internet since malicious programmers like to hide viruses in these types of files.

.gif – This extension indicates another image file and it stands for “Graphics Interchange Format.” .Gif files are often smaller than .bmp files (described earlier) and they’re commonly found on Internet web pages.

.jpg – This extension indicates yet another image file and it stands for “Joint Photographers Experts Group.” Like the .gif file, it’s commonly found on Internet web pages, however it’s much smaller than both the .gif image and the .bmp image.

.mid – This extension indicates a sound file created with a Musical Instrument Digital Interface. Windows Media Player will open and run these files, however they don’t sound like normal .wav or .mp3 files (described later). .Mid files are designed to product synthetic sounds using a computer’s sound card.

.mp3 – This extension indicates a sound file that authentically reproduces voice and/or music. Windows Media Player will open and run this kind of file.

.scr  – This extension indicates a screen saver file.

.sit – This extension indicates a Macintosh archive StuffIt file. They will not open on a Windows system without a special utility.

.ttf  – This extension indicates a font especially designed for use on a Windows system. It stands for “True Type Font.”

.txt – This extension indicates a plain text file that can be opened with Notepad.

.wav  – This extension indicates a sound file that like the .mp3 file, can be opened with Windows Media Player or Windows Sound Recorder. .Wav files are much larger than .mp3 files.

.zip – This extension indicates a Windows archive WinZip file. They will not open on a Macintosh system without a special utility.

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Viruses What They Are And One Reason Why People Make Them
Saturday, December 12th, 2009 | Author: plt

Over recent years, computers have become synonymous with viruses and viruses don’t show any signs of disappearing any time soon. In recent news, LiveScience.com reported that “Before the month is even done, April has set a record for virus e-mails.”1 In the past, we would be comfortable in telling new computer users not to worry about viruses and that catching a computer virus is rare. Today, that would be some of the worst advice we could give anyone. As reported in countless news reports, computer viruses are rampant and they’re extremely worrisome. This article will describe what viruses are and then point you in the direction of some rather unique protection and prevention.

In short, a computer virus is a software program designed to destroy or steal data. It attacks computers via distribution – often unknowingly – through email attachments, software downloads, and even some types of advanced web scripting. Viruses that destroy data are known as Trojan horses, viruses that explode their attacks are called bombs, and viruses that duplicate themselves are called worms. Some viruses are a combination of each, however they can be further identified according to where they’re located on a computer.

A virus originating from the boot sector of a computer is a boot-sector virus and this nasty devil does its dirty work the moment a computer is turned on. A virus that attaches itself to (infects) other programs is a file virus and activates the moment that an infected program starts. File viruses may also be referred to as parasitic viruses, however should a virus work from both the boot-sector and from an infected program, the virus is then known as a multipartite virus.

Why viruses exist remains a mystery, however we had privy access to the mind behind a virus programmer who explained his motivation behind his destructive inclinations. Apparently, this person had a deep grudge against a popular online service which shall remain unnamed. In this hacker’s mind, the online service failed to do a quality job in protecting children from online smut and as retaliation, he created and distributed a virus to as many file libraries of this service as he could. His intentions were to disable the computers of the online service’s users so much that they wouldn’t be able to connect for days. In his mind, the loss of connection meant loss of revenue for the online service.

Although the malicious code that this person generated may have worked for a small percentage of users, sufficed to say, the online service continued on and still exists today. Despite his motivation or intention, his efforts were null.

We wouldn’t be surprised to learn if other motivations behind spreading viruses were similar to this person’s, but that doesn’t justify the damage that viruses do. Innocent people become pawns for the evil plans of others who’ve convinced themselves they’re doing the “right” thing.

To protect a computer from getting a virus, or clean a virus from a computer system once infected requires the use of an antivirus utility. But may be something else we can do. Perhaps we could make an effort to educate the people who want put viruses into the public about ways to display dissatisfaction with a service or product that don’t involve harming innocent parties. In doing so, we just might reduce the number of virus news stories and protect our own investments at the same time.

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Using Computers | It’s Not Rocket Science
Friday, November 27th, 2009 | Author: plt

These days it’s strange to hear people say, “I’m just not computer literate,” as computers have evolved from archaic scientific calculators to simple point-and-click type machines. We suspect that today’s “computer illiterates” are people who haven’t taken the time to experiment with such a machine. And we strongly believe that spending just twenty minutes with one could turn the most adamant technological caveman into any one of those who have fun wreaking chatroom havoc on the Internet today.

Today, one only needs to learn how to manipulate a mouse, punch a few buttons on a keyboard, or really just turn the thing on to use a computer. It’s hard for some folks to believe, but the computers of this generation almost run themselves! For fun, let’s investigate just how little knowledge these thousand-dollar machines actually require.

Can an absolute newbie operate a computer without knowing how to use a mouse or keyboard? Assuming that a computer is set up to operate on voice command – sure! Voice command software allows users to tell a computer what to do and the computer responds by fulfilling the user’s commands. Although it’s pretty new and still under development, voice directed technology has already infiltrated consumer service related systems.

Think back to the last time that you paid a bill over the phone. Instead of speaking to a human being, chances are that you spoke to a computer that not only responded to what you said and followed the commands that you gave it, it also asked you for more information such as your full name or credit card number. In this case, a person (such as yourself) operated a computer without even knowing it!

Can an absolute newbie sit down at a computer without knowing how to use one? Assuming that a computer is set up to operate on touch command – the answer is again, yes! Touch command software allows users to literally touch objects on a monitor and tell the computer what to do with a finger. Known as “kiosks,” these programs are already in use world wide at ATM machines, employment centers, and in health monitoring systems.

Neither a mouse nor a keyboard is required. A computer user only needs to touch various boxes on a screen to control a computer. Sure, the programming behind such technology is extensive and advanced, but to the end user, it makes computer use less intimidating and plain easy.

Of course when we talk about operating a computer, we envision more involvement than speaking on the phone or touching things on a screen. The above illustrations were just a couple of examples of how far computer technology has grown, and how far we’ve pushed “user-friendliness” to its limit. Eventually, the keyboard and mouse will have to play a role when computer newbies have to work with one as a cash register, as a hotel booking program, or as a library’s catalog system.

These requirements don’t make computers any less easier to operate, but they don’t make them that much harder either. So much of today’s software is designed to accommodate the experience of a new user that anyone could get connected to the Internet, send an email message, and download an MP3 file within the first five hours of purchasing a personal PC.

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Understanding Compression What It Is and What’s Involved
Saturday, October 10th, 2009 | Author: plt

Downloading files from the Internet has always been one of the most popular activities on the Internet – third to sending email and browsing the web. We download files from software libraries, ftp directories, YouTube and Google Video, MP3 sites, and we download files sent to us as email attachments.

Being so popular an activity, it’s imperative that you compress the files destined for another computer. File compression combines a number of different files into one file, and it can also significantly reduce a very large file to a smaller one. As a result, the transmission of a compressed file across the Internet is faster and smoother. This article looks at compressed files a little closer and it describes how to compress and decompress them using two of the most popular archiving programs.

Identifying Compressed Files

Most files are compressed in .zip format (if you’re using Windows) or .sit format (if you’re using a Mac). The two most popular software programs used to compress and decompress files are Winzip and StuffIt respectively. There are other programs that do the same thing and there are even programs that can compress and decompress files for both the Windows and the Mac system. However since Winzip and StuffIt are the most popular, we will assume you will use either one to compress and decompress your own files.

If you download a compressed file from a website or file library that ends in an .exe extension, take note that although the file is compressed, it’s typically a file that will install a program onto a computer. .Zip or .Sit files don’t install software – they merely archive a collection of them into one, or they significantly reduce the size of a larger one.

Decompressing Files

Assuming that you have Winzip or StuffIt installed on your computer, you can access the files archived inside a .zip or .sit file by simply double-clicking the archive (a file ending in a .zip or .sit extension). Double-clicking one of these kinds of files will open up a window that displays the contents of the archive. In most cases, you can double click a file inside this window to use it, or you can select it and drag the file to a folder to view later.

Depending on how you elected to install Winzip or StuffIt, you may be able to right-click a .zip or .sit file and have the program extract its contents into a new folder for you.

Compressing Files

When you want to upload a file or email a collection of files to a friend, it’s best to archive it as a .zip or .sit file first. This will decrease the time it takes for your computer to send it elsewhere, and it will also decrease the time it takes for someone else to download it.

To create your own .zip or .sit file, you can select a single file or a group of files from within Explorer, and right-click the selection. Again, depending on how you installed Winzip or StuffIt, you can click the “Add to Zip” or “Add to Sit” option and have these programs automatically archive the file(s) into one.

Some files compress better than others and in some instances, you may not notice that much of a difference. The files that compress the best are images, documents, and multimedia files. Executable files (files that end in an .exe extension) don’t compress that well, however when they’re archived with a sizable number of other files, they compress rather well. Go figure!

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Open Source Software
Wednesday, September 23rd, 2009 | Author: plt

If you’ve spent any lengthy amount of time on the Internet, you’ve probably heard of open source software but might not have fully understood what it is and why it even exists.  This article will describe this recent phenomenon and describe some of its benefits for the software using community.

In a nutshell, open source software is software made by everyone – for everyone. The hopes behind its development is that through its open access, it will evolve into something that represents the true desires of computer users. Through a wide network of user involvement, the software in question is enhanced and debugged without costs or administrative politics.

Traditionally, software is developed behind closed doors. A team of professional coders build it but the community at large isn’t part of its conception. It’s costly to produce and as you can probably guess, that cost is passed on to the end user: the consumer. Open source software on the other hand is free. Free to download, free to install, free to use, free to modify, and free to share.

Started over twenty years ago, it’s a phenomenon that is gaining in both popularity and exposure. In its first conception, open source gave birth to the World Wide Web as we know it today. The Internet as a whole is the result of free permission to access the web, use the web, contribute to the web, and share the web with others. But it certainly hasn’t stopped there. In the not too distant past, Netscape converted its once commercial version of its Navigator web browser to open source. And today, open source is venturing into the commercial realm as well.

At first thought, the idea of open source may sound just plain crazy to those who earn a living from software development. But the facts point to a different prediction. Open source software puts companies in a terrific position to re-brand and re-position themselves in a market that they may have not been able to reach before. In the business world, open source is all about image and when consumers witness corporations contributing (instead of selling) to the buying public, they gain big favor in the eyes of their users (plus tremendous opportunities to sell other items).

Inviting the public inside a product’s development builds community and trust. It also sets the platform for increased reliability. Fans of open source programs are adamant about reliable software and highly criticize commercialized versions for being buggy and error-prone. Avid fans even proclaim commercialism is the cause of shoddy software.

Another benefit that open source brings to light is the speed at which its products are developed, enhanced, supported and distributed. This is because the people who regularly contribute to an open source product do so for unmotivated reasons (other than perhaps to feed the ego.) They’re highly talented, they’re available, and they care. Bringing money into any project can almost mean instant death. It can kill motivation, desire, and a true willingness to create a good product. In a commercial setting, participants work for a paycheck rather than for the product. And this is what puts open source projects far ahead of its monetized competition.

As a software user, this means you can contribute to an open source project as well, and help to develop it into a product that reflects your direct preferences. You aren’t “stuck” using open source software the way you would be stuck using an expensive word processor or database. You have the same access to open source software as its programmers have and in essence, you are your own customer!

Perhaps at this point you’re wondering where you can get in on this wonderful opportunity. There are plenty of open source opportunities sprinkled across the Internet and they can be easily found though any search engine. Google “open source project” and you’ll be sure to find more resources than you can shake a stick at!

Category: Operating System  | Tags:  | Leave a Comment
Smartphones What’s the craze all about?
Friday, August 14th, 2009 | Author: plt

If you haven’t heard of smartphones, we’d like to learn where you’ve been hiding all this time. Smartphones have been all over the news and chances are, you do know what they are – only you know them under a different name. Smartphones are mobile phones with computer like capabilities.

What’s that? Aha! Yes, you’ve not only heard of them, you’ve probably seen them as well.  Packed with Internet access, email capabilities, address books, and a whole lot more, cell phones have come a long way since their first debut. But be careful not to confuse these newest toys with sandbox devices.

Sandbox devices are tools that come pre-loaded with things like calendars, calculators, and a notepad. What differentiates them from smartphones is that users can add (download and install) additional programs to smartphones and they seemingly become mini portable computers for the people who use them. That – and the ability to edit the content that sits on them – is what makes these phones “smart.”

Some of the more popular brand names include the Blackberry, PalmSource, Nokia, and Windows CE. Yet the craze is extending to even some off-brand company names. Today, it’s hard to find a cell phone that doesn’t offer some sort of “smart” technology because it’s in such a high demand. The convenience of having information at our immediate access is phenomenal – so much so that thousands of programmers have jumped on the opportunity to build unique applications specific to these small machines.

As a result, you can find tons of games, databases, GPA systems, weather reporting programs, and even small encyclopedias on these things – each accessible not at the click of a mouse – but at a few presses of a free thumb. Of course a mini keyboard is available for the text-messaging fan or for the poor fellow who can’t seem to get away from the office. In the latter case, don’t be surprised if you find the entire Microsoft Office suite displayed within a screen no bigger than a matchbook.

Is this a phase? That’s highly doubtful. The market for these devices extends from the highly technical and professional all the way to the pre-teen socialite. The product crosses all demographics and thanks to decreasing costs – it sees no economic boundaries as well. The Wikipedia encyclopedia claims that “Out of 1 billion camera phones to be shipped in 2008, Smartphones, the higher end of the market with full email support, will represent about 10% of the market or about 100 million units.”

But what is it that makes smartphones so appealing? As mentioned, smartphones give us the ability to not only carry our data around with us where ever we go, it also gives us the ability to edit that data any place – any time. In today’s “reality” based generation, we’re always looking for the opportunity to capture and relive a moment. And we want to share that moment with others. At best, smart phones give us the opportunity to express ourselves impromptu with entertaining results.

Attempting to do the same with a bulky desktop computer or laptop is to cumbersome. Even some of the smallest peripherals (digicams, digital cameras, etc.) don’t give us the same opportunities that smart phones do. Being able to carry around a device for communication, creation, recording, and editing simply compliments the need for today’s generation to do more and then do it, faster!

Category: Gadget  | Tags:  | Leave a Comment
Protecting Children Online Steps Toward Making Your Computer “Weirdo-Proof”
Sunday, July 12th, 2009 | Author: plt

It’s an unfortunate fact of reality, but children are the most victimized computer users on the Internet today. The good news is that there are some practical steps you can take to protect your children from sexual predators, hackers, and other seedy individuals who want to cause harm. This article will describe a few of them.

The first step in protecting your children at the computer is to prevent their access to  passwords. This will keep them from sharing passwords with others and inadvertently enabling hacking into your system. If you think about it, there’s no reason why a five, seven, or even twelve year old needs to know the passwords to sensitive areas on the computer unless you’ve given them permission! In fact, children don’t need to know the password used to access the Internet either. It may be a hassle to type it in each time they want to get online, but it’s better to know the times that they connect than to have them sneak online without your permission and knowledge of their activities.

The second step towards protecting your children online is using the computer together. Siting next to your child while he or she peruses the Internet, you can guide him or her to make safe and intelligent decisions. You can approve websites and bookmark them together. You can monitor the conversations your children have with their friends and teach them appropriate online behavior at the same time. You can make recommendations and create a private time for quality time as well.

The third step involves blocking access to inappropriate areas altogether. You and your children may not always agree about what’s appropriate, but as a guardian, you’re in control and you’re ultimately responsible for their safety. Take the time to investigate software tools that put you in control and allow you to block access to certain websites. If you use an online service like AOL (America Online), you can use its internal Parental Control settings to block access to various chatrooms and websites. You could even block instant messaging and email from anyone who isn’t a fellow AOL user.

Other tools available online operate similar to the way that AOL’s Parental Control settings work, however no collection of tools could replace the reinforcement of mom and dad. Never let your children speak with strangers and never leave them alone at the computer unattended. Children just don’t have the experience that adults have and they don’t have the skills required to handle inappropriate conversations, emails, or images found online.

NOTE: Some of these tools include kid-specific web browsers that will visit pre-approved websites. Others include browser plug-ins that won’t allow access to online areas that contain forbidden keywords.

Another step requires teaching your children to never ever volunteer personal information. Under no circumstances, should children give their personal names, home addresses, phone numbers, or school information to anyone over the Internet regardless of the situation.  In the even this information is required to enter a contest of some sort, be sure that you’re the one who makes the decision to supply it and that you’re the one who does it.

Performing all of these steps won’t be easy. However you can help minimize resistance to your monitoring efforts by explaining why you’re taking these precautions. Smaller children will probably enjoy the time you spend together at the computer, but older children and pre-teens may resent it. To help build a case for your concern, you might want to show your older children a few news stories that exemplify the dangers that unsupervised children are exposed to. The newspaper is unfortunately full of examples but with your help, we can reduce them world-wide.

Category: Computer  | Leave a Comment
In Today’s Society, Protecting Your Computer Is A Requirement
Tuesday, June 23rd, 2009 | Author: plt

Advances in computer technology is a double-edged sword. On one hand, it affords us quick and easy access to numerous conveniences such as bank statements, favorite shopping centers, school and health records, and more. On the other hand, it can also grant the same access to those who aren’t supposed to get it. Although it’s a rare occurrence, hacking has become the biggest criminal nuisance in computer history.

Make no bones about it. There’s nothing innocent or cute about the hacker. Today’s hackers aren’t the pimply-faced teen rebels that you might be thinking of. Instead, this generation of hackers are grown individuals who are more than likely earning a living by stealing the identities of innocent, law abiding individuals and then selling those identities to others who want to slip by the system. And the only protection against these seedy people is prevention.

Computer security couldn’t be more important than it is today and that’s why we’ve taken the time to introduce it to you.  You can reduce the probability of experiencing identity theft by making your computer as hacker-proof as possible. All that’s needed is a little software and a lot of common sense.

1. Install an anti-virus/anti-spyware program. Anti-virus/anti-spyware software will stop malicious code from downloading and installing onto your computer while you peruse the Internet. Known as viruses, worms, or spyware, this malicious code can destroy important files and render your computer good for only one thing: sending sensitive data back to the server of an identity thief.

2. Don’t store sensitive data on your computer in the first place. Should your computer get infected with a virus, worm, or piece of spyware, you can thwart the individuals responsible by not storing your personal information on your PC so that when and if your computer does send back data – it won’t be anything valuable. Hackers look for things like full names, social security numbers, phone numbers, home addresses, work-related information, and credit card numbers. If these things aren’t saved onto a computer, there’s nothing critical to worry about other than restoring your computer to a non-virus condition.

3. Don’t open files without scanning them with an anti-virus/anti-spyware program. In the past, the warning was to avoid opening files from people that you don’t know. Today it’s really not safe to open files from anyone (without scanning the files) because that’s how viruses get spread – through files – even by mistake. So even though your co-worker may have emailed a funny video, it’s no more safe to open than a video downloaded from a complete stranger. Be safe and scan each and every file you download from the Internet or receive through email regardless of where it came from.

4. Create a barrier between your computer and prying eyes. Anti-virus/anti-spyware programs are only effective after the effect. But you can prevent identity theft from occurring by installing a firewall. A firewall is software that checks all data entering and exiting a computer and it then blocks that which doesn’t meet specified security criteria (user-defined rules).1

5. Don’t click on website links in spam messages. In an effort to obtain personal information, some spammers will send email that asks you to click on a link. The email messages are often disguised as important messages from well-known online establishments, and they often try to scare their readers into clicking links with threats of closing an account of some sort. Sometimes the links are harmless and attempt to con the reader into volunteering personal information (credit card number), but other times the links attempt to download harmful software onto a computer.

Your best protection against computer crimes is your own knowledge. Hopefully the suggestions above will prompt you into taking appropriate action and into protecting your computer with the suggested tools. In doing so, you’ll not only protect yourself, you’ll prevent the spread of these malicious activities and protect others at the same time.

Category: Computer Security  | Tags:  | Leave a Comment
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