Manufactures small hand sized RS-232 and RS-422 test monitors. Used for troubleshooting, communications software design, data capturing, serial sniffing, and line diagnosis of circuits. http://www.protocolanalyser.com
Manufactures specialized test equipment. Products include Computer Monitor Testers, Data Cable Testers, and SCSI Bus Testers. http://www.datasynceng.com/
Acquitek is distributing high end, high performance modular instrumentations in most popular form factors as such PCI, cPCI, PXI & VXI. http://www.acquitek.com