With hindsight, the machine lacked the RAM ( a typical program would need to fit in only around 20 kB once display memory is subtracted ) and processing power to take on the prevailing Sinclair ZX Spectrum and Commodore 64.

This gives the effect of a simple toggle speaker similar to that seen in the 48 kB Sinclair ZX Spectrum.

Although not as well supported by the biggest software publishers as rivals like the Commodore 64 and Sinclair ZX Spectrum, a good range of games were available for the Electron.

One nibble of such a byte then controlled the foreground color, and the other nibble controlled the background color, a system very similar to the Sinclair ZX Spectrum, in fact in the 256x192 mode the display mode was virtually identical to the video of the Sinclair ZX Spectrum.

It was designed to compete in the mid-1980s home computer market dominated by the Commodore 64 and the Sinclair ZX Spectrum, where it successfully established itself primarily in the United Kingdom, France, Spain, and the German-speaking parts of Europe.

On the Sinclair ZX Spectrum it is accessed by and.

Ports of the game were released for the Commodore 64, Sinclair ZX Spectrum, Amiga, Atari ST, MSX, Amstrad CPC, Sharp X68000, PC ( MS-DOS, 1989 and 1996 ), Apple II, FM Towns Marty, Sega Master System, Game Boy, Game Boy Color, Game Boy Advance, Nintendo DS, PlayStation, Sega Saturn, Nintendo Entertainment System, Famicom Disk System, Sega Game Gear, mobile phone ( Sprint PCS ), Texas Instruments TI-8x series of calculators and UltraCade's Taito Arcade Classics.

In the private home computer market, where games were a significant driver, the Dragon suffered due to its graphical capabilities, which were inferior to contemporary machines such as the Sinclair ZX Spectrum and BBC Micro.

Both had been on the design team for the Sinclair ZX Spectrum.

The Sinclair QL ( for Quantum Leap ), was a personal computer launched by Sinclair Research in 1984, as the successor to the Sinclair ZX Spectrum.

Microdrives had been introduced for the Sinclair ZX Spectrum in July 1983, although the QL used a different logical tape format.

Physically, the QL was the same black colour as the preceding ZX81 and Sinclair ZX Spectrum models, but introduced a new angular styling theme and keyboard design which would later be seen in the ZX Spectrum +.

* RWAP Adventures-Adventure programs for the Sinclair QL and ZX Spectrum

Some software, especially games for the MSX, Sinclair ZX Spectrum and other Z80 based computers, took Z80 assembly optimization to rather extreme levels, employing the duplicated registers among other things.

The same slot bus was continued on the ZX81, and later the ZX Spectrum, which encouraged a small cottage industry of expansion devices, including memory ( Sinclair produced RAM expansion packs for the ZX80: the original ZX80 RAM Pack held either 1, 2 or 3 KB of static RAM ; a later model held 16 KB, using dynamic RAM chips ( DRAM )), printers, and even floppy drives.

The ZX Spectrum ( pronounced " Zed-Ex ") is an 8-bit personal home computer released in the United Kingdom in 1982 by Sinclair Research Ltd.

Referred to during development as the ZX81 Colour and ZX82, the machine was launched as the ZX Spectrum by Sinclair to highlight the machine's colour display, compared with the black-and-white of its predecessor, the ZX81.

The keyboard included a form of Single-key keyword input, similar to that used on the Sinclair Spectrum, via the ' func ' key.

As a games machine the Electron shared the same failing as the Sinclair Spectrum in not having a joystick port.

The Spectrum version was also voted number 58 in the Your Sinclair Readers ' Top 100 Games of All Time.

An enhanced version of the Spectrum with better sound, graphics and other modifications was marketed in the USA by Timex as the Timex Sinclair 2068.

These were later used in a revised version on the Sinclair QL, whose storage format was electrically compatible but logically incompatible with the Spectrum's.

* PC-20 the Australian version of the Sinclair PC200

In 1955 this version was recorded by conductor Sir Malcolm Sargent with John Cameron as Macheath and Monica Sinclair as Lucy.

The Spectrum version was voted number 34 in the Your Sinclair Readers ' Top 100 Games of All Time.

The ZX Spectrum version was voted the 16th best game of all time in a special issue of Your Sinclair magazine in 2004.

The ZX Spectrum version was placed at number 67 in the Your Sinclair official top 100, with reviewers praising the visceral sound effects.

A movie version, Under Milk Wood directed by Andrew Sinclair, was released in 1972.

* A New Zealand version was broadcast in the 1980's, hosted by Peter Sinclair.

The ZX Spectrum version was voted the 6th best game of all time in a special issue of Your Sinclair magazine in 2004.

It was followed by an improved version, the Timex Sinclair 1500.

* Suitcase version of Timex Sinclair 1500

The keys on Sinclair ZX Spectrum computers were " rubber dome keys " which were sometimes described as " dead flesh ", while the " American " version of the Timex Sinclair 2068 was described as having " chiclet keys ".

A version of the SuperBASIC language from the Sinclair QL was to be provided in place of the old ZX Spectrum BASIC and support for the CP / M operating system was also intended.

The ZX Spectrum version was voted number 9 in the Your Sinclair Official Top 100 Games of All Time.

* Timex Sinclair 1000 ( a U. S. version of the ZX81 )

The Spectrum version of the game was not received quite as well as the original, however, Sinclair User said it was " A corker.

The " Timex Sinclair 2048 " although never produced, was to be an improved version of the Sinclair ZX Spectrum computer.

The ZX Spectrum version was voted number 1 in the Your Sinclair Readers ' Top 100 Games of All Time.

The ZX Spectrum version was voted the 2nd best game of all time in a special issue of Your Sinclair magazine in 2004.

Salinger, Upton Sinclair, and the journalist Hunter S. Thompson, who was primarily known for his works in the American magazine Rolling Stone.

One of the first low-cost calculators was the Sinclair Cambridge, launched in August 1973.

The Sinclair calculators were successful because they were far cheaper than the competition ; however, their design was flawed and their accuracy in some functions was questionable.

GCCS came under the supervision of Hugh Sinclair, who by 1923 was both the Chief of SIS and Director of GCCS.

Although the HBC maintained a monopoly on the fur trade during the early mid 19th century there was competition from James Sinclair and Andrew McDermot ( Dermott ), independent traders in the Red River Colony.

On 3 March 1969 Alexander Rhea, managing director of General Motors-Holden's at the time, was joined by press photographers and the Federal Minister of Shipping and Transport, Ian Sinclair as the two men drove the two millionth Holden, an HK Brougham off the production line.

The Sinclair QL ( though the QL was a sister machine to the ICL One Per Desk, which also used a 68008 ) was the most commercially important.

During the 1970s and 1980s, RPN was even known to the general public, as it was widely used in handheld calculators of the time – for example, the HP-10C series and Sinclair Scientific calculators.

The trip to Mexico was for Eisenstein to make a film produced by Sinclair and his wife, Mary Craig Kimbrough Sinclair, and three other investors organized as the " Mexican Film Trust ".

" The contract also stipulated that the film would be " non-political ," that immediately available funding came from Mrs. Sinclair in an amount of " not less than Twenty-Five Thousand Dollars ," that the shooting schedule amounted to " a period of from three to four months ," and most importantly that " Eisenstein furthermore agrees that all pictures made or directed by him in Mexico, all negative film and positive prints, and all story and ideas embodied in said Mexican picture, will be the property of Mrs. Sinclair ..." A codicil to the contract, dated December 1, allowed that the " Soviet Government may have the film free for showing inside the U. S. S. R ." Reportedly, it was verbally clarified that the expectation was for a finished film of about an hour's duration.

Even though Soviet film executive Boris Shumyatsky encouraged Sinclair in undermining Eisenstein it was derailed not as much as Bezhin Meadow by the Soviet film industry, but by its American backers.