Breakthrough Software was a software company based in Novato, California. Breakthrough developed and sold the Time Line project management software for PC DOS computers, releasing the first version in 1984, and version 2.0 in July, 1985. Company staff in the 1980s included president William Lohse (1984-1985), COO and CEO Victoria Lohse and president Andrew Layman starting in 1986. The product was slightly renamed to Timeline by October, 1986. Breakthrough was acquired by Symantec in 1987. Symantec continued to release versions of Timeline until at least version 6.0 in 1994.