Virtual instrument software architecture (VISA) is a widely used application programming interface (API) in the test and measurement (T&M) industry for communicating with instruments from a computer. VISA is an industry standard implemented by several T&M companies, such as, Anritsu, Bustec, Keysight Technologies, Kikusui, National Instruments, Rohde & Schwarz, and Tektronix. [https://en.wikipedia.org/wiki/Virtual_instrument_software_architecture] ---- [http://tclvisa.sourceforge.net/%|%tclvisa] – Tcl binding to VISA API <<categories>> Device Control