The part number doesn't matter ... it may represent discs made in different locations, it may represent discs made at different times ... one part number or CD does not "belong" to a specific PC(s).  The important thing is the Service Pack ... you want to keep/use the disc with the MOST RECENT Service Packs - it will save you a lot of headaches, be it with drivers (in the case of XP SP3) or with downloading/installing updates after the install.
Hello Everyone, I just recently started a new job as a PC Technician, there are a massive amount of Reinstallation CDs for Windows XP, Vista, and 7 that I am trying to sort through. As I went through it looked as though I had duplicates of Dell Reinstallation CDs, (7 copies of Windows XP SP2) but at a second glance I realized that these CDs have several different P/N. Not sure what to make of it, since I'm not as familiar with Dell. My question to the support community is this: How can I find out which P/N apply to which Models of Dell Computers, or is this a transparent thing, meaning I can chunk extra copies of the same CDs? Thank you
Reinstallation CD Differences