Their products included two spreadsheet programs, Q-calc and eXclaim, a project management system, MasterPlan, and a floating license server, Maitre D. The company was sold to Island Graphics.

[2] Horowitz has been actively engaged as an expert witness testifying in numerous peer-to-peer file sharing legal cases.

[6] In 1999, Horowitz was appointed Director of Information Technology and Distance Education in USC's Viterbi School of Engineering.

He renamed the organization USC's Distance Education Network (DEN)[7] and moved course delivery from satellite to the Web.

DEN currently offers numerous graduate level courses leading to master's degrees, primarily in computer science and electrical engineering.