The BT Model III was a souped-up Tandy-made TRS-80 Model III. B.T. Enterprises installed a faster processor, high-quality drive controller with floppy and hard drives, and a real-time clock.
BT Model III Microcomputer (1983, desktop)
Original Retail Price: $3,995 to $4,295
Base Configuration: 4MHz Z80A CPU, DOSPLUS 4.0, 48K RAM, 5.25-inch floppy disk drive, 5MB hard disk drive, integral monochrome CRT, integral keyboard/keypad
Important Options: 10- or 15.7MB hard disk drive