Z22 (handheld)

The Z22 was one of the first of Palm, Inc.'s handhelds to be released under the new "Palm" brand, and the first to be released without the "Zire" moniker. Released on October 12, 2005, it replaced the monochrome Zire 21, and was priced at $99 USD. The Palm Z22 came with Palm OS Garnet 5.4.9 preloaded and it is not upgradable. It featured a 200 MHz Samsung S3C2410 ARM processor developed around the 32-bit ARM920T core that implements the ARMv4T architecture. The Z22 ran on a li-ion battery that had a life of about 8 hours depending on usage.

Overview

Designed to be attractive to first-time users, the Palm Z22 included many of the basic applications made famous by the iconic Palm family of handheld PDAs. Positioned as an entry level PDA and priced below the $100 price mark it lacked pricy extras such as: a camera, an MP3 player, an expansion SD memory slot, etc.

It included a wall charger and a USB cable to trickle-charge through the USB interface when connected to a PC (so the wall-socket charger can be left at home). The Non-Volatile File System (NVFS), also known as NVRAM, ensured that data was never lost even if the battery was fully discharged.

Z22 (computer)

The Z22 was the seventh computer model Konrad Zuse developed (the first six being the Z1, Z2, Z3, Z4, Z5 and Z11, respectively). One of the early commercial computers, the Z22's design was finished about 1955. The major version jump from Z11 to Z22 was due to the use of vacuum tubes, as opposed to the electromechanical systems used in earlier models. The first machines built were shipped to Berlin and Aachen.

By the end of 1958 the ZMMD-group had built a working ALGOL 58 compiler for the Z22 computer. ZMMD was an abbreviation for Zürich (where Rutishauser worked), München (workplace of Bauer and Samelson), Mainz (location of the Z22 computer), Darmstadt (workplace of Bottenbruch).

In 1961, the Z22 was followed by a logically very similar transistorized version, the Z23.

The University of Applied Sciences, Karlsruhe still has an operational Z22 which is on permanent loan at the ZKM in Karlsruhe.

In the 1970s, clones of the Z22 using TTL were built by the company Thiemicke Computer.