CSS was formed in 1996 and has since been able to grow into an establishment that deals in the sales, service and maintenance of computers , computer accessories & photocopy machines. In June 1996, the company was appointed official representative of Gateway computer in Tanzania. Gateway is one of the top ten computer manufacturers in the world. It is a fortune 500 company founded in 1985. The company, headquartered in North Sioux City, South Dakota, has manufacturing facilities in the United States, Ireland and Malaysia.

In May 1998 Computer Sales & Services was appointed official representative of Lanier photocopiers, faxes and multifunction devices (MFD) in Tanzania. Lanier was founded in 1934. It is a sister company of HARRIS. While most vendors are talking about "build it and they will come", Lanier remains committed to "bring us your needs and we will solve them" approach.

In September 2001 Computer Sales & Services was appointed sales & service center for Stellar Information Systems. The company which understands the importance of Data and has dedicated itself to data safety and recovery.In January 2003 we took over the Business Center at Hotel SeaCliff where we not only provide business center services but have also given internet connection to all the rooms and have set-up hotspots though out the hotel. This was our pilot project for HPNA products. HPNA is product range which allows computer network to be formed over an existing telephone network, no extra cabling or maintenance is required for the computer network.