General Acronyms
- a.k.a.
- also known as
- ABS
- Automatic Block Signalling
- acc.
- accession
- c
- circa (suffix to numeric date)
- ca.
- circa (prefix)
- col.
- collection
- CTC
- Centralized Traffic Control
- ETT
- Employee Time Table
- ft.
- foot or feet
- ibid
- in the same place
- in.
- inch or inches
- n.a.
- not applicable
- n.d.
- no date
- n.p.
- no publisher
- no.
- number
- nos.
- numbers
- op. cit.
- [L opere citato] in the work cited
- p.
- page
- pp.
- pages
- PTT
- Public Time Table
- rr
- railroad
- ry
- railway
- TT
- Time Table