Abstract: According to one embodiment, a method for annotating client-server transactions with a computer executing software comprises receiving a stream of transactional data associated with a plurality of events on the computer, wherein the plurality of events correspond to one or more actions taken by a user of a computer, and partitioning the stream of transactional data into a plurality of portions. The method further comprises sorting the plurality of portions into one or more groups based on the similarity of one portion of the plurality of portions to another portion of the plurality of portions, and receiving non-transactional data, comprising information about the plurality of events, from the computer. The method may also comprise identifying, for each group of the one or more groups, based on the non-transactional data, a possible action of the one or more actions taken by the user and labeling each group based on the identification.