olla meaning in Information Science terminology / glossary / dictionary is:
A type of writing material made in southern India and Sri Lanka from young leaves, especially of the palmyra palm, soaked in water and pressed flat, then cut into strips approximately three inches wide and one to three feet in length. Holes are made in one end of each strip through which they can be attached by a cord to wooden boards to form a book (click here to see an 18th-century example with lacquered covers). The mixture of charcoal and oil rubbed into writing incised in the leaf surface with a metal stylus may have helped preserve the earliest pre-Christian examples. According to Harrod’s Librarians’ Glossary (Gower, 1990), this type of book is still made by Buddhist monks in Sri Lanka. The term also applies to documents of this form and material. Also spelled ola.