At 07:21 PM 4/11/2010, Jack wrote: >does anyone know the test equip mfgr that uses a four digit no 6981 plus >xxxx to identify part nos? HP largely used xxxx-yyyy part numbers. I don't recognize the 6981 prefix, but it might be HP. Dale H. Cook, Contract Engineer, Roanoke/Lynchburg, VA http://plymouthcolony.net/starcityeng/index.html