This brings back memories! I had the PalmPilot and the Psion 5 back then, and after that a HP41CV which was not shown here maybe because of the form factor, but it has alphanumeric and was fully programmable complete with tape strip storage and a printer.
One forgets now that back then that cassette tape was the standard for storage, and I remember my Sinclair ZX81 used cassette tapes too. Glad he mentioned the Tandy brand as yes elsewhere we had the Sharp and a good friend of mine used one of those for his engineering studies in the mid-1980's.
The late 1980's was really the advent of proper pocket organisers and 'computers' that all synced via cradles or docking stations to your desktop computer.
Watch Pocket Computers from the 1980s
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