This application note compares the features, execution speed and ease of software development for switch/measure solutions used in functional test and data acquisition environments. It examines the Keithley 27xx, Racal 1256, Agilent 34970A and Agilent 34980A Switch/Measure Units, as well as an Agilent 3499A/34401A combination, Agilent E1411B/ E1476A VXI combination, and a National Instruments PXI-4070/SCXI-1128 PXI combination in the Visual Studio.NET application development environment.