Sisoft, formerly Cozum Bilgisayar, was established in 1987 in Sivas,Turkey by the same founder Omer SISO, is a family based company which was incorporated in 1989. The headquarters was moved to Ankara in 1996. The company is producing software of Laboratory Information System, PACS, Tablet PC/PDA Applications, Web-based Applications, Kiosk System, Appointment System, Queue Paging System, RFID Access Control System, Patient Call and Guidance System, Web Cam Applications, Internet Applications, Mobile Health Applications, Business Intelligence Applications, Smart Card Applications and Hospital Information System in Middle East Technical University -Technopolis. Sisoft put into practice the first version of Appointment System via Phone in Sivas District Hospital, Appointment System via Internet in Karadeniz Eregli Hospital & Remote Terminal Connection in Cumhuriyet University Faculty of Medicine Hospital. Sisoft is the member of the organizations like Informatics Associations of Turkey (IAT), HL7 (Health Level 7), TUBISAD (Turkish Informatics Industrialists and Businessmen Association), YASAD (Software Industrialists Association), IMMIB (General Secretariat of Istanbul Mineral and Metals Exporters' Association), TurkMIA (Turkish Medical Informatics Association), BIYESAM (Informatics and Software Copyright Association), Metutech-BAN (Technology Financier Network).