HP-75


The HP-75C and HP-75D were hand-held computers programmable in BASIC, made by Hewlett-Packard from 1982 to 1986.
The HP-75 had a single-line liquid crystal display, 48 KiB system ROM and 16 KiB RAM, a comparatively large keyboard, a manually operated magnetic card reader, 4 ports for memory expansion, and an HP-IL interface that could be used to connect printers, storage and electronic test equipment. The BASIC interpreter also acted as a primitive operating system, providing file handling capabilities for program storage using RAM, cards, or cassettes/diskettes.
Other features included a text editor as well as an appointment reminder with alarms, similar to functions of modern PDAs.
The HP-75D added a port for a bar code wand, often used for inventory control tasks.
The HP-75 was comparatively expensive with an MSRP of $995 for the 75C or $1095 for the 75D, making it less popular than the cheaper successor model, the HP-71B.
The HP-75C has a KANGAROO printed on its PCB, as its codename.
HP-75D codename's is MERLIN.

Reception

BYTE praised the flexibility of the appointment scheduler, which the review noted could comprise part of a real-time control system because of its ability to execute BASIC programs. It concluded that the computer "is a well-integrated and powerful machine... if you are interested in... a very portable computer with powerful real-time scheduling capabilities, you should look closely at the HP-75".