Hewlett Packard had produced calculators for years, but the the HP-75C was their first handheld portable computer. Notable features inlcuded a single-line liquid crystal display, 48 KiB system ROM and 16 KiB RAM, a large keyboard, a manually operated magnetic card reader (2×650 bytes per card), 4 ports for memory expansion (1 for RAM and 3 for ROM modules), and an HP-IL interface that could be used to connect printers, storage and electronic test equipment. It sold for a price of $995
