[header] How to copy photographic slides into a computer [title] Decide which method is best for you. [step] Flatbed scanners are very cheap (you can purchase a good one for under $100) and most will have the ability to scan photos and slides. If you are primarily interested in scanning slides, look for one with a slide scanning attachment. 
[title] Make sure that the scanner will work with your pc. [step] If you are using a mac, ensure that the scanner is mac compatible; likewise with a pc running microsoft windows, or linux.