One Per Desk: Компьютер для офиса и связи.

The One Per Desk, or OPD, was an innovative hybrid personal computer/telecommunications terminal based on the hardware of the Sinclair QL. The One Per Desk was built by International Computers Limited (ICL) and launched in the United Kingdom in 1984. It was the result of a collaborative project between ICL, Sinclair Research and British Telecom begun in 1983, originally intended to incorporate Sinclair's flat screen CRT technology. Rebadged versions of the OPD were sold in the United Kingdom as the Merlin Tonto and as the Computerphone by Telecom Australia and the New Zealand Post Office. The initial orders placed for the One Per Desk were worth £4.5 million (for 1500 units) from British Telecom and £8 million from Telecom Australia, with ICL focusing on telecommunications providers as the means to reach small and medium sized businesses. 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.

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). The OPD was supplied with either a 9 inch monochrome (white) monitor, priced at £1,195 plus VAT, or with a 14 inch colour monitor, priced at £1,625 plus VAT. Both monitors also housed the power supply for the OPD itself. Later, 3.5" floppy disk drives were also available from third party vendors.

Aimed at the "office automation" market and seeking to integrate computing and telecommunications technology, combining support for both voice and data, the One Per Desk 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". The ComputerPhone attempted to sit between more specialised telephony devices and more advanced workstations, being marketed as an "executive" workstation in Australia, somewhat more towards middle management in New Zealand. Advertisements emphasised the telephony, office suite, desktop calculator, videotex, terminal and electronic messaging capabilities.

An enhanced version of the OPD was produced in small numbers for the United States market. This had a 68008FN CPU, 256 KB of RAM as standard, an RS 232 port and enhanced firmware. The telephone answering function had a female voice, with a slight New Jersey accent.

ICL were the preferred supplier for UK local government, and OPDs found their way onto desks of council officers. Due to the cost, they tended to be issued only to the most senior, who were often elderly, had no interest in computers, and had secretaries to handle their administrative work, so many devices were simply used as telephones.