Complex sentence: It was formed in the mid 1980s by Gordon Walton, Mike Jones, Rob Brannon, Don Gilman and others from Applied Computing Services about 1986, a small IT service firm.
Split into simpler sentences: It was formed in the mid 1980s by Gordon Walton, Mike Jones, Rob Brannon, Don Gilman and others. The company was formed from Applied Computing Services about 1986, a small IT service firm.