Keithley has approximately 500 products that are used to source, measure, connect, control, or communicate direct current (DC) or pulsed electrical signals. Product offerings include integrated systems along with instruments and personal computer (PC) plug-in boards that can be used as system components or stand-alone solutions. Keithley customers include scientists and engineers in the worldwide electronics industry involved with advanced materials research, semiconductor device development and fabrication, and the production of end products such as portable wireless devices.