Apple Computer today unveiled the 240 Mhz PowerBook 3400, enabling the company to claim bragging rights to the world’s fastest portable computer. The new PowerBook, which runs on a PowerPC 603e CPU, also features built-in Ethernet, hot-swappable bays, and a four-speaker sound system. A 180 Mhz version is now available; the 240 Mhz version will be released in April.

Apple also announced a new line of desktop Macs and the Newton eMate 300, a handheld system that will only be sold to students. The new computers are part of Apple’s latest attempt to win back the hearts—and marketshare--of computer buyers