The Mining Claims Information System (MCIS) was developed by the Bureau of Mines to provide a real-time, pc-based tool for obtaining active mining claim data in Alaska. The MCIS consists of a searchable database system made up of Bureau of Land Management and state of Alaska computerized mining claim records. MCIS allows searching of active mining claims by a number of keys, including claim serial number, kardex number (assigned by the Alaska Division of Mining), claim name, owner, and public land survey. The user can search by a full or partial key to rapidly locate the data of interest. This version of MCIS contains mining claims that were active as of February 1990. There are 73,142 claims on the database, consisting of 42,376 state and 30,766 federal mining claims.