The HP 95LX Palmtop PC (F1000A, F1010A), also known as project Jaguar, was Hewlett Packard’s first MS-DOS-based pocket computer or personal digital assistant, introduced in April 1991 in collaboration with Lotus Development Corporation. It can be seen as successor to a series of larger portable PCs like the HP 110 and HP 110 Plus. The HP 95LX had an NEC V20 CPU (an Intel 8088 clone running at 5.37 MHz) with an Intel Corporation System on a chip (SoC) device. It cannot be considered completely PC-compatible because of its quarter-CGA (MDA) resolution LCD screen. It ran Microsoft’s MS-DOS version 3.22 and had a customized version of Lotus 1-2-3 Release 2.2 built in. Other software in read-only memory (ROM) included a calculator, an appointment calendar, a telecommunications program, and a simple text editor.
It also included a CR 2032 lithium coin cell for memory backup when the two AA main batteries run out. For mass storage, the HP 95LX had a single PCMCIA slot which could hold a static RAM card (which had its own CR 2025 back-up coin cell). An RS-232-compatible serial port was provided, as well as an infrared port for printing on compatible models of Hewlett Packard printers. In character mode, the display showed 16 lines of 40 characters and had no backlight. While most IBM compatible PCs work with a hardware code page 437, the HP 95LX’s text mode font was hard-wired to code page 850 instead. Lotus 1-2-3 internally used the Lotus International Character Set (LICS), but characters were translated to code page 850 for display and printing purposes.<ref name=”HP_1991_95LXUG”> Successor models to the HP 95LX include the HP 100LX, HP Palmtop FX, HP 200LX, HP 1000CX, and HP OmniGo 700LX.