If I add a new computer to iTunes Match will cd content from my old computer show in the match

Hello real23,

It sounds like you have iTunes Match on your first computer and want to add a second computer to iTunes Match so that you can see the content from your first computer. This is exactly what iTunes Match is meant for:

iTunes Match is a service that safely stores all your music in iCloud—even songs imported from CDs or not purchased in the iTunes Store—and makes it available on up to 10 of your devices and computers. With iTunes Match, you have access to your complete iTunes music library at any time.

You can find the full article here:

iTunes 11 for Mac: Access all your music anytime, anywhere with iTunes Match

http://support.apple.com/kb/PH12284

Thank you for posting in the Apple Support Communities.

Best,

Sheila M.