Its product line included the TPM-II and III operating system, Valdocs, a robust BASIC language implementation, a graphics API library used by a variety of products which initially supported line drawing and fill functions and was later extended to support the QX-16 color boards, Z80 assembler, and low level Zapple machine code monitor which can be invoked from DIP switch setting on the rear of the machine.

The "Abacus" is a IBM PC compatible machine released in 1985 booting MS-DOS 2.11 from 64 KB ROM.

[citation needed] Its successor, the dual-processor QX-16, added a 16-bit Intel processor with Color Graphics Adapter enabling it to also boot MS-DOS 2.11.

The initial release of Valdocs includes WYSIWYG word processor and spreadsheet applications (with onscreen fonts, an UNDO key, keyboard macros and multiple screen formats), a cardfile database, an E-Mail/communications module, and a desktop manager with an address book, mailing list manager, notepad, spell checker, ValDraw & ValPaint, calculator and more.

Valdocs was one of the first environments that allowed users to embed items like spreadsheets and figures in word processing documents.

[4][5] BYTE in September 1982 favorably reported on the forthcoming QX-10 and Valdocs—then scheduled to ship by Christmas 1982—after a private viewing.

The magazine cited Epson's dominance of the printer market as among the reason to expect the success of what it described as perhaps "the first of a new breed of anybody-can-use-it 'appliance' computers".

We lost data each time, came close to losing a whole disk, and ended up retyping it into our trusty IBM PC to meet deadline".

It advised users to backup their files, but stated that since the process was so slow the computer encouraged them to avoid doing so until it was too late.

[7] While praising the QX-10 itself ("Physically this is an excellent machine")[8] and Valdocs' ease of use, Jerry Pournelle wrote in BYTE in August 1983 that "the first problem is obvious from the other side of the room.

"[10] The president of one QX-10 user group complained in April that the word processor was "slow compared to my mother running the mile ...