Tim,

If a list was field delimited in a spreadsheet, it can be ordered by any row or column. The list just needs to be fleshed out with relevant info inuding the design date. There are a number of fields that come to mind that would be of interest to include in such a list.

If the list was kept publicly (eg on Trenton), it would grow in information wealth with time. To me, that list ought to include the full SPA as well as CPA date range so roughly mid to late 50's all the way to turn around (1993-1995).

The only tricky part would be version control which is typically handled with software in closed or controlled networks.

David