 In the US, the major manufacturers are easy enough to find at trade shows such as that of the Armed Forces Communications-Electronics Association (AFCEA), but details are often scanty until there is a meeting at which classified information can be exchanged.Several firms, however, do have a much higher profile.One challenge, especially in the US where there are many mergers and acquisitions, and in Europe where a consortium model is more common, is keeping track of the names of manufacturers.