MDA is the brand name with which PDAs made by HTC are marketed. These MDA PDAs are sold by T-Mobile and the following are some of the models available: MDA I, MDA Compact, MDA II and MDA III. As HTC has launched its own lineup of PDAs and smart-phones since late 2006, it no longer works as an OEM for other companies and so the MDA lineup of PDAs has been discontinued by T-Mobile (although one can still find the page by googling T-Mobile MDA, the resulting page however shows that the MDA is now "Out of Stock"). The following types of products are available at PDAaccessories: Bluetooth, Package, Leather Cases, Carrying Case, Chargers and Synchronizers, Stylus, Data Storage, Battery, Screen Protectors, Screen Cleaning Kits, Hands Free, Keyboards, Kits, Gaming Console Accessories, Booster Sticker, Antenna and Amplifiers, Gadgets, Cameras, Laptop Chargers, Laptop Keyboards, Wireless Cards, GPS Batteries and GPS Mounts.

The i-mate company is a rather recent addition to the PDA market and till late 2006 carried products manufactured by HTC the Taiwanese mobile device giant. In 2006 HTC decided to start selling its devices under its own brand name and soon after ended business relations with i-mate. Thereafter i-mate started carrying devices from other manufacturers such as Inventec and TechFaith. i-mate is an expanding company and recently opened a new regional base in Singapore. i-mate products use Microsoft Windows Mobile OS and among their more popular products are: i-mate Jam 900, i-mate PDA 2, i-mate PDA2K and i-mate Jam. Accessories for the following laptop manufacturers are available at PDA Accessories: Acer, Averatec, BenQ, Canon, Dell, Fujitsu, Gateway, Hitachi, HP, MacBooks by Apple, JVC, Mitsubishi, NEC, Nikon, Sony, Toshiba, Trigem, Viewsonic, WinBook, etc.