THE BLUE STICKER
This indicates that a photograph has been used in either an SI book or in SPORTS ILLUSTRATED KIDS.
Many slides carry printed labels detailing what is happening in the photo. These labels are more prose than poetry, usually limited to the who, what, where and when.
THE YELLOW STICKER
This identifies the issue in which the photo ran. In this case it was a 1996 Chicago Bulls championship commemorative, created by SI's specialty publications division, SPORTS ILLUSTRATED PRESENTS (SIP for short). More often these stickers carry an issue date from the regular weekly edition.
Before digital images could be transported electronically, slides were mailed or couriered for outside use. Often duplicates were made. These stamps mark this slide as an original—with a concerned caretaker at home.
Older slide mounts needed to be cut open when the image was scanned. The mounts would then be reassembled with tape.
THE X NUMBER
Every photographer at every event is assigned a unique X number used for precise cataloging. So every shot John W. McDonough took at this game would be marked X41516. Another photographer at the same game would have a different X number.
TAKE, FRAME, ROLL
Shots are further cataloged by take (generally a commonsense grouping, such as all shots from the first half of a game), by frame and by film roll. This photo, therefore, is from Take 1, Frame 8, Roll 17.
INTO THE SYSTEM
A red dot means the photo has been scanned into SI's electronic photo library.
Some photos, like this one by Neil Leifer, have appeared in books and been marked by publishers with their own annotations.
FIT TO PRINT
The dimensions are a sizing instruction to the technician who is making a physical print from the photograph, for framing or another use.