The listing, Vintage AlphaSmart Pro Keyboard With Adapter, Manual and Apple ADB to Serial Cable has ended.
Historical AlphaSmart Pro Keyboard w/ adapter & Apple Apple Desktop Bus to Serial converter cable.
* Portable, Battery Powered, Word Processor.
* Runs on two AA batteries of the same type (inc. a fresh set of batteries).
* Includes adapter.
* Compatible with legacy PC (via PS2) & MAC (via ADB).
* Supports 8 different files stored at one time. Files do not erase upon exit.
* Includes original manual.
* Free US shipping.
From Wikipedia:
The AlphaSmart was a keyboarding device that enabled a person to work on the go, much like a laptop computer, but it was strictly for word processing, as it functioned essentially like a simple digital typewriter... Since the AlphaSmart, Dana, & NEO were specialized for limited purposes, they were generally much cheaper than a standard laptop computer. All of these devices were meant to be plugged into an ADB, PS/2, or USB port for transferring the written text into a computer's word processing document for further editing (such as indentation & font preference) or printing if so desired.
The AlphaSmart saved every keystroke directly to the machine's RAM, which was maintained by a battery backup even when powered down. AlphaSmarts could transfer data either by a special program that communicated with the AlphaSmart or by the simpler method of transmitting the keystrokes of the written text as if it were the computer's keyboard. When not transferring text, the AlphaSmart could be used as a standard keyboard.
AlphaSmarts were very popular in schools for their affordability & durability. Elementary schools & high schools used them; & they were particularly popular among special education departments for use by students with graphomotor challenges.
The machines were also popular among journalists & writers, who found them easy to carry & appreciated the full-size keyboard & long battery life.