Abstract: A method of synchronizing databases between multiple users in a peer-to-peer network is disclosed. The method comprises extracting changes from a source database of one of the users. Next, the changes are compressed and sent to the other users in the peer-to-peer network in parallel. Finally, the changes are decompressed and replicated on the database of each of the other users. In this respect, the databases of the other users will contain all changes from the source database.

Abstract: A tool is provided for opening a lock, particularly a mortise cylinder type lock, the plug of which has been drilled out with drill bits available in the art. The lock opening tool, which is inserted into this prepared opening includes a hollow member, preferably a cylindrical tube having an opening along one diameter into which a strip of spring steel is inserted, and an opening along the circumference, at the opposite end of the cylindrical tube, through which the end of the strip of spring steel can be extended, essentially at a 90.degree. angle. In use, the cylinder lock which must be opened without the benefit of a key, for example because of a lost key, is drilled out by using essentially standard means through the cylinder plug, which is a continuation of the hole already started.