References

The are dozens of incredible references online dealing with the history of computing, and especially about the TI-99/4 and TI-99/4A computers. I list as many as I can find for your reference:

• 99er - The TI-99/4A Home Computer Page = One of my favorite TI-99/4A websites. This site provides a ton of information about the computer and includes downloads of many TI-99/4A manuals (although most, I've found, are of lower quality).
• Area99 = A unique, though not information-rich TI-99 website.
• AtariAge TI-99/4A Forum = A great TI-99/4A forum covering many topics and offering multiple downloads.
• Centre for Computing History = This is a UK-based, general computing history website that has numerous articles involving the TI-99/4A.
• Eli's Software Encyclopedia = This software-focused website includes many articles about TI-99/4A software. It's written using MediaWiki (the same software as this website and Wikipedia).
• Every Game Going = A huge database of video games and software developers for pretty much any console.
• GameFAQs = A large database of gaming information for many consoles, not just the TI.
• Games Database = A large, generalized database for all types of video games, including many TI-99/4A games.
• GameSpot = Another database containing information about many games from numerous gaming systems.
• The Giant List of Classic Games Programmers = Exactly what it sounds like, this site focuses on programmers, and the games and systems they worked on, specifically on systems pre-NES.
• Internet Archive: Texas Instrument TI 99/4A Books Collection = This is a collection of scanned manuals, magazine, and other TI-99/4A references about the TI-99/4A. Not easily searchable, but fun to peruse. While you're visiting the Internet Archive, search it for other TI-99/4A texts that haven't made it into the TI-99/4A Collection.
• The Log Book - Category Archives: TI 99/4a = Although a The Log Book has a small list of TI-99/4A software that it treats, it's entertaining to read and informative.
• Mainbyte = A retrogaming website including information about the TS 1000, TI-99/4A, TRS 80 PC-4, and the VIC-20.
• Moby Games = A general video game website that hosts several TI-99/4A game pages.
• Ninerpedia = A great resource run on Mediawiki (the same software as Wikipedia and this website).
• Obsolete Technology Website = This website is dedicated to preserving the history, and important background information covering computing devices from 1970 through 1993.
• The Personal Computer Museum: Canada's Video Game Museum = This is a fairly extensive website featuring old computer systems, hardware, and antiquated software. It's a fun place to reminisce and waste some time.
• Pixelated Arcade = Refers to itself as "A museum of vintage video games featuring photos, information, screenshots, artwork, and more." It really contains what it says.
• PixelPedant's Texas Instruments Manuals Compendium = This site has hundreds of manuals in .pdf format for cartridge, disk, and cassett software.
• Rediware's TI-99/4A Page = Rediware has information about software and other items, including a fairly extensive set of TI-99/4A pages. I link to Rediware's main TI-99/4As landing page.
• Resources for the TI-99 line of retro computers = Tons of information and documents for the TI-99/4A home computer system.
• Retrogaming Times Monthly = An archive of an older website covering multiple 1980's computing devices.
• TI-99/4 Home Computer 1979 = This is a great reference with plenty of information about software and hardware.
• TI-99 Infospot = This is a very broad website covering many more TI items than the TI-99 and 99/4A, but has great, high-resolution photos and links to various other sources.
• TI Game Shelf = This is a unique site that I rarely, if ever, reference on any pages within my site. It hosts several games, most of which never appeared in command module format. Many of them are even newer creations folks are still making today. A great reference when you're looking for something unique and fresh for your TI-99/4A or an emulator.
• The TI-99/4A Tech Pages = A mostly hardware-focused website.
• TI99ers On-Line User Group = A vast collection of useful TI-99/4A information (if you can find it). Not the easiest site to navigate, but certainly worth some time.
• TI-99/4A Video Game House = A strictly TI-99/4A page covering many of the most popular video games for the TI-99/4A. One of my favorite resources. It hasn't been updated for a while, but neither has the TI-99/4A, so it's totally legit.
• TIDB = Like the name implies, this is a large database of TI related information. It isn't very in-depth, but fairly complete.
• Whtech = A large database of downloadable files dealing with the TI-99/4A. Although there is a ton of information, the website isn't terribly intuitive nor visually appealing. But, if you know what you're looking for, Whtech probably has it.
• WikiPedia = A site I'm sure everyone is familiar with. This presents many articles on TI-99/4A hardware and software.