sentences:  In 1989, sales revenue reached nearly $160 million.Applied Biosystems maintained 15 offices in 9 different countries, and introduced four new products.The company developed enzyme-based reagent kits made by Promega Corporation, and in the new field of bioinformatics, licensed with TRW Inc.. Also, joint marketing began with Perkin-Elmer Corporation and Cetus Corporation (formerly of instruments and reagents for DNA replication, the fastest growing segment in biotechnology.