Compartiment.
A small compartment; SYN. pigeonhole. cubby-hole
A drawer, cupboard, compartment, or chest, esp. one in a school or dormitory, that may be closed with a lock.
1. A hole or small recess for pigeons to nest
2. A small open compartment (as in a desk or cabinet) for keeping letters or documents
3. A neat category which usually fails to reflect actual complexities
4. A small compartment in a desk or case for the keeping of letters, documents, etc.