By 1984 IBM was Palm Beach County's largest corporate employer, with 8,500 Boca Raton employees. Among other noteworthy IT accomplishments, such as the mass production of the System/360 and development of the Series/1 mainframe computers, IBM's main complex was the birthplace of the IBM PC, which later evolved into the IBM Personal System/2, developed in nearby Delray Beach. Starting in 1987, IBM relocated its manufacturing for what became the IBM PC division to Research Triangle Park in Raleigh, North Carolina, and converted the manufacturing facilities into offices and laboratories, later producing products such as the OS/2 operating system and VoiceType Dictation, later known as ViaVoice voice-recognition software.