- You may be looking for the company on Pete's World.
International Electromatics was a company founded by Tobias Vaughn on Earth, with Packer acting as head of security. Martyn Townsend was working there when he was modified with Cyber-technology. (PROSE: The Scales of Injustice)
It was at one point the world's largest manufacturer of electronic equipment; their micromonolithic circuits were present in almost every piece of electronic equipment sold.
When the Cybermen planned their invasion of Earth, they struck a deal with Vaughn: that the world was to be put under Cyber control, through the micromonolithic circuits, and then Vaughn would become the ruler of Earth. Both Vaughn and Packer were killed during the invasion, which later failed when the Cyber-fleet was destroyed. (TV: The Invasion)
The company was shut down after the incident. However, Professor Ralph Cornish revitalised the British Rocket Group with technology from International Electromatics. (PROSE: Who Killed Kennedy) Sir Marmaduke Harrington-Smythe tried to buy the company, without success. (PROSE: The Scales of Injustice) By the 24th century, it had changed its name to INITEC. (PROSE: Original Sin)