Bert, I have been doing this Part Numbers stuff for a good 20 / 30 years. I write a lot of software for CAD to assembly with concentration in the PCB Assembly and SMT assembly areas. Contact me off line as I would probably bore most folks on the list. Quickly: You need to consider your users and other company software systems first. Most CAD tool library management threads have limited intelligence for sorting, searching and interfacing with out-side system. Purchasing tolls typically provide better, but still limited functions. I tend to lean towards using "Abstract" numbers (Example 376892132) instead of Functional (Example: SMR-5%-0606-5.1K) but using abstract require other tools have good search and find interfaces. That is seldom the case. Functional number schemes often "Fail" when different folks start using different schemes or the initial scheme is not well planned. Either way you end up with a mess. Bob K. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Bert Steck Sent: Thursday, August 16, 2012 10:50 AM To: [log in to unmask] Subject: [TN] Part Number Classification System We are establishing an internal part numbering system. Request referral to classification/category schema. In the past (1980s) used EEM catalogue. Don't see it available or updated out there. ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________