Boolean operators

   AND", "OR" and "NOT

In the early '70's a university library requested database search cost about $5.00 a minute. So, even with "deep pockets" it was important to be precise.

I continue to learn and refine with the Mudcat insights
of true pro's like SRS.

Sincerely,
Gargoyle

where have the others gone? Deceased, Bored, Disease - M Sato etc.