Shreve Systems was a reseller of used Macintosh computers and peripherals based in Shreveport, Lousiana. They appear to have closed as of 2002:
After 24 years of impeccable service to the Apple and Macintosh community, we at Shreve Systems will be closing our doors and focusing our efforts into bringing the same level of renowned service to our sister company, Shreve Audio. Shreve System has enlisted the professional services of Remarketing Associates and will be conducting a public auction to liquidate all of our remaining inventory. This auction will be held DEC 13 2002 at our warehouse at 1200 Marshall st. Shreveport. La.
Their domain shrevesystems.com still continued to be active for a number of years so we're not sure if this was a new owner of the company assets.