A guide to using the Psion II, considered the first practical portable computer by many. It found many uses in industry, commerce and the consumer market. The reliability and durability is a testimony the simplistic robust design and means there are plenty still working from nearly 40 years ago!

Waterboard, milkman, surveyor and barcode - Psion News Magazine from https://www.jaapsch.net/psion/
Message Pad 100 - https://en.wikipedia.org/wiki/MessagePad
All About The Pentiums - Weird Al
Party like its 1999 - Photo by Edoardo Tommasini from Pexels

Want to have a go?
Try this JAVA emulation
https://www.jaapsch.net/psion/jape/ja...