What is the fine-grained topic of the following text: A recent request made by the Virginia Contracting Activity (VACA), which is the public face for the Defense Intelligence Agency's contracting business, has asked for a firm to come forward which has the "ability to work and store classified information at the SECRET Collateral Level" and to design customized "cellular phone point-to-point communication systems." Only return the topic.
Virginia Contracting Activity's request for a firm capable of handling secret classified information and designing customized cellular communication systems.