The Alameda County mosquito abatement district currently uses microcomputers to process operational data, to transmit data by telephone and to do word processing. The computer hardware consists of a model I (48K RAM) and two model II (64K RAM) Radio Shack microcomputers. An 8 megabyte hard disk system provides the primary on-line storage. The programs have been written in BASIC programming language by district employees. Each workday the district processes operational data to update various direct access files. The files, in turn are accessed to create inspection and treatment schedules and to generate a variety of reports. The automated system has proven to be relatively inexpensive, processing greater quantities of data more rapidly than the manual system that it replaced.