(n) asset register number
(n) (comp) identification number
(n) flag signaling
semaphore
(n) examinee's (seat) number
(n) (comp) message indicator
(n) (comp) sequence-number
(n) item number
product ID number
reference number
(n) (comp) aiming symbol
aiming circle
aiming field
(n) ellipsis
(n) (comp) redundancy code
(n) (comp) chrominance signal
(n) (comp) signal detection
(n) (comp) signal regeneration
(n) (comp) signalling protocol
(n) (comp) signal processing
(n) (comp) signal transformation
signal shaping
(n) waiting for a traffic light
(n) beam (signal)
(n) (comp) signal transformation
signal shaping
(n) one who runs a red light or stop sign
(n) (comp) signal degradation
(n) (comp) graphic symbol
(n) (comp) constraint set
(n) reference number
(n) (manufacturer's) serial number
(n) call number (e.g. of a book in a library)
(n) (comp) selection signal
(n) distress signal
SOS
(n) pilot number
(n) caret (symbol for omitted word)