Many of us didn't begin taking photographs yesterday with the advent of digital cameras. We began with silver and film and chemicals in darkrooms. Many of us with 30+ years of files realize that having a system to find what we have taken in the past. Unfortunately, many of us do not have everything cataloged or in containers that preserve the materials. During a good deal of the time I have photographed regularly, color slides in there nice oblong boxes provided a place to put the rolls as they came back from the processors. (Kodachrome was always sent out and required 2 weeks or more to return) I began early, classiffying my rolls with a simple system. I numbered each roll 7501 with the first two digits designating the year and the seconf two digits indicating the number of that roll in that year chronologically. When I got my first "real" computer in 1985, I set up a database of "Roll Records" that recorded important information about the roll. At some point I moved all these slides into cardboard boxes that held about 4-6 rolls. I used empty slide mounts to keep them separated. I used a rubber stamp to put a roll number on each slide mount. Over the years, I experimented with adding two more digits to identify individual slides. These attempts were short lived. I felt that if I could maintain the roll and its general contents that would be all I really needed. I was shooting any where from 1 rolls to 60 rolls per year as my picture taking waned or was temporaryally replaced with a different form (video, polaroid).