You probably already use PayPal to pony up purchases made online. It's safer than exposing your credit card info to a retailer you may not have done business with yet. Well, now

PayPal is available on your Android phone

so you can send money to someone while on the go. Great for paying up for bar bets if nothing else...

Every time you install a piece of software, you're presented with page upon page of legalese, detailing how you're allowed to use the software and how you're not. This is the

End User License Agreement or EULA

, pronounced E U L A or often, just u-la.

Wireless Application Protocol or WAP is a standard for accessing the mobile web and its content on mobile phones. Everything from email delivery to browsing the web on our phones came about thanks to WAP. Michael "Doctor File Finder" Callahan explains.

When you're in the world of

wireless networking

there are lots of terms, lots of acronyms, and lots of things that seem to make little sense.

SSID

is one such acronym, which Michael "Doctor File Finder" Callahan explains.

PixelPipe is a cool site that lets you

share photos, videos

and more with over 100 other sites. Upload once and send your photos and videos to a bunch of different social networking and blogging sites. This saves you updating hundreds of different

social media, photo or video

sharing pages individually. Now you can use

PixelPipe right from your iPhone

with this

awesome free iPhone app

.

As you travel around the Internet, visiting Web sites, occasionally you'll get a "404." It could be an image heavy page, it could be just text. It might be funny, it might be serious.

What is a 404?

Michael "Doctor File Finder" Callahan explains these "page not found" error pages.

Sticky notes

have changed the way many people work. You just jot a note down on one and stick someplace. On a table, a desk, a screen, a keyboard or on the wall. Having your monitor plastered with physical sticky notes is the past though. Tacking virtual sticky notes to your computer desktop is the way to go. Doc shows us

where to find Sticky Notes in Windows 7

.

You hear a lot of talk about "Android" lately. The

mobile operating system from Google

has caught on in smartphones and other mobile devices. But

what exactly is Android

? Why should you care about Android? Michael "Doctor File Finder" Callahan explains.

Hypertext

is used to generate links that lead you from one place to another. At first glance it's almost magical. You see text, you click on it, and it takes you someplace new.

Hypertext is the foundation of the World Wide Web.

Michael "Doctor File Finder" Callahan explains.

PixelPipe is a cool online service for

sharing photos, videos, text

and more. We love it so it stands to reason, we want it on our Android handsets as well. Michael "Doctor File Finder" Callahan offers a

guided tour of PixelPipe on Android

.