HPL[2]

A language used in HP9825A/S/T Desktop Calculators, 1978(?) and ported to the early Series 200 family (9826 and 9836, MC68000). HPL is fairly simple and standard, but includes extensive I/O support for data acquisition and control (BCD, Serial, 16 bit custom and IEEE-488 interfaces), including interrupt handling. It is currently owned by Structured Software Systems.

"HPL Operating Manual for Series 200, Models 216, 226 and 235\6", HP 98614-90010, Jan 1984.