1979 Event Percom Data Company Inc release Microdos for Radio Shack's TRS-80 1979 Event Apparat releases Newdos + 2.1 for Radio Shack's TRS-80 1977 Event 1st TRS-80 computer sold 1977 Event 1st TRS-80 Model I computer sold 1977 Event Radio Shack issues a press release introducing TRS-80 computer 25 existed, within weeks thousands were ordered 1977 Event Radio Shack officially begins creating TRS-80 computer
