Hello, Am new to this forum and am looking forward to learning more. I guess you could call this a mid-life thing, but I'm trying to collect and organize ALL my photos. This goes back to grade school and through present. Fortunately, I kept my negs in the envelope with the original photos for about 3/4 of my pics. The others are presenting the problem. Many rolls are of photos taken during reunions at a children's home. These go back to our first in 1986 and continue every three years. Approx. 200 of these have been kept loose in a box and I'd like to put them in order. What do all those numbers on the back of some prints mean? For example- <No.17A>036 12+00 NNNNN+21AU 0108 I understand 17, but what does the A mean? I think the rest of those, except for the last 4 have something to do with the developing? And the last four digits? What's a discriminator to help me identify which groups of pics are from the same roll? Any help would be appreciated. Thanks!