On 7/2/2013 6:54 AM, m.roth at 5-cent.us wrote: > Just so you know, that's not only in the computer industry. Many years ago, been common practice in the computer industry for a long long time. The first computer system I learned to program on, and my first full time job, were on the krufty old IBM 1130 small computers, which date back to the mid 1960s. These came in 4 'core' sizes, 4K, 8K, 16K and 32K... except actually there were only 2 physical core sizes, 8K and 32K... if you'd bought/leased the 4K or 16K models, there was a jumper on the backplane disabling half your memory. -- john r pierce 37N 122W somewhere on the middle of the left coast