The Equity I was the first system introduced, equipped with an Intel 8088 CPU and one or two 5.25" floppy disk drives.

It ran at the PC's standard 4.77 MHz clock rate, came with 256 KB RAM, expansion above 512 KB required an expansion board, displayed CGA video, had few available expansion slots, only two half-height drive bays, and lacked a socket for an 8087 math chip.

Subsequent versions, the Equity I+ and Apex 100[3], upped the clock rate to 10 MHz, the standard RAM to 640 KB, supported 3.5-inch floppy drives and hard disks, sported an 8087 socket, and had a "MGA - Multi-Graphics Adapter" card, offering an Hercules compatible monochrome mode, and a new 160x200 eight colors mode.

[4] Epson bundled some utility programs that offered decent turnkey functionality for novice users.

The Equity was a reliable and compatible design for half the price of a similarly-configured IBM PC.