Category Archives: Computers, Pocket
In the early 1970s, “handheld” or “pocket” calculators and computers were introduced. They were small and portable and could easily be carried to the field in a pocket of a surveyor’s vest.
Computer, Pocket HP33E
The HP-33E and HP-33C were the basic scientific programmable members of the 30 series. The...
Computers, Pocket
In the early 1970s, “handheld” or “pocket” calculators and computers were introduced. They were small...
Computer, Pocket HP25
The HP-25 was introduced in 1975. It was called a calculator by Hewlett Packard, however,...
Computer, Pocket HP41CX
Hand held computer Hewlett Packard Model 41CX S/N 2851S22388.
Computer, Pocket, Monroe 324
Calculator, Monroe 324 (s/n 5312849), charger pack and adapter with cables, three instruction books, all...
Computer, Pocket, Monroe 324G
Computer, Monroe 324G, s/n 5313747, approximately 23 cm (l) X 14 cm (w) X 7...
Computer, Pocket, HP35
The HP-35, Hewlett Packard’s first pocket calculator, was introduced in 1972.
Computer, Pocket, HP21
Hand held calculator Hewlett Packard Model 21 S/N 1607S19611.
Computer, Pocket, HP31E
Hand held calculator Hewlett Packard Model 31E, S/N 1843S33243.