Abstract: A socket can be readily programmed to adapt the pin out configuration of an integrated circuit for convenient plug-in use or substitution in an environment, such as a socket, ordinarily intended for a similar integrated circuit with a different pin-out configuration. The invention includes a support, a first plurality of electrical contacts mounted in a prescribed pattern on one side of the support, a second plurality of electrical contacts mounted in a similar prescribed pattern on the other side of the support, and a programmable device, such as an EPROM, to which all the contacts are connected that can be programmed to complete or to open electrical paths between contacts. Printed circuit traces and plated through holes couple respective first contacts on one side of the support and respective second contacts on the other side of the support to the programmable device.