A vertical line of MegaLABs that is connected by a column FastTrack^® Interconnect path in an APEX^™ 20K, APEX^™ II, or ARM^®-based Excalibur^™ device, or a vertical line of LABs that is connected by a column FastTrack Interconnect path in an ACEX^® 1K or FLEX 10KE device.