The One Per Desk, or OPD, was a British innovative hybrid personal computer and telecommunications terminal based on the hardware of the Sinclair QL.

[7] Sales of the OPD worth $42 million were reportedly made by ICL within the first nine months of the product becoming available, largely involving contracts with British Telecom and the telecommunications authorities of Australia, Hong Kong and New Zealand.

[8] From the QL, the OPD borrowed the 68008 CPU, ZX8301/8302 ULAs, 128 KB of RAM and dual Microdrives (re-engineered by ICL for greater reliability) but not the Intel 8049 Intelligent Peripheral Controller.

Unique to the OPD was a telephony module incorporating an Intel 8051 microcontroller (which also controlled the keyboard), two PSTN lines and a V.21/V.23 modem, plus a built-in telephone handset and a Texas Instruments TMS5220 speech synthesiser (for automatic answering of incoming calls).

Aimed at growing office automation market and seeking to integrate computing and telecommunications, combining support for both voice and data, the product was perceived as the first of its kind designed to meet the needs of managers, who would be relying on old-fashioned paper-based practices to perform their "complex and heavy workloads" involving a variety of ongoing activities including meetings, telephone calls, research, administration and numerous other tasks.

Such potential users of information technology had apparently been ignored by office automation efforts, and personal computers were perceived as "exceeding most managers' requirements".

Described as a "wildly visionary product" and an "original concept marred by a woefully inadequate implementation", even years later it stubbornly remained a "constant reproach to the company".