Apple Computer, which introduced the Newton MessagePad in 1993, was one of the first companies to offer PDAs. Shortly thereafter, several other manufacturers offered similar products. Today, one of the most popular brands of PDAs is the series of Palm Pilots from Palm, Inc.

PDAs are also called palmtops, hand-held computers and pocket computers.

iPhone for Business - iPhone supports Microsoft Exchange ActiveSync, push email, and more.

The Cadillac of Cases - Premium long-life leather belt cases - for all mobiles, smartphones, cell phones and PDAs. Hand made just for you. The best protection money can buy!

PDA Overview 
Outlines the history, evolution and technologies behind the PDA. Includes graphics, diagrams and an integrated glossary.

Natural handwriting recognition for the Apple's Newton PDA
Apple Newton reference page containing links to software alternatives for handwriting recognition.

NewtNews
NewtNews is a weekly freeware newsletter that provides news and information for the Apple Newton and related technologies. In addition, this site offers links to FAQs, related sites, mailing lists, user groups, and software reviews.

PDA Groove
PDA Groove offers reviews of handheld PCs, PDAs and mini-notebook computers,including:pilot,palm,WindowsCE,Newton, Psion, mini-notebook PCs and ultra-slim notebooks.

Yahoo!'s Personal Digital Assistant software page
Yahoo!'s directory of links to Personal Digital Assistant software.