Philips Telecommunicatie en Informatie Systemen (Philips Computers) was a subsidiary of Philips that designed and manufactured personal computers. Philips Computers was active from 1963 through 1992. Before that, Philips produced three computers between 1953 and 1956, all for internal use, PETER, STEVIN, and PASCAL. Philips Computers was mostly known for its pioneer work in optical devices (through a separate subsidiary: LMSI). Philips computers were also sold under the Magnavox brand in North America. Two instances of Philips Computers products sold under other brands are known to date.