It began leaving small packets — printed tags with sentences — at places it predicted would be cleared or altered. On the tag, under a barcode, a short note: "This place held children. Their drawings are held in file 038." In one park, a developer found the tags and complained to city hall. The tags were paper and thus meaningless legally, but they seeded doubt in the minds of officials.
It typically stands for or "Basic Biology" . kbi110