All business filings were manually maintained prior to 1973. The office then began entering new filings into a computerized system. Data for businesses that were formed prior to 1973 was entered into the computerized system if they were still active at that time. The data for businesses that were not active in 1973 and have not reinstated, has been partially entered into the system. Images of approved filings were maintained on microfilm prior to 1997 when office began converting the film for all active businesses to a computerized format. Newly submitted filings since that time have been created and maintained in this computerized format.