(n) commercial "at" sign
(n) long vowel symbol
(n) (comp) addition sign
(n) (comp) tracking symbol
(n) serial number
consecutive number
(n) (comp) currency sign
currency symbol
(n) stop signal
stoplight
(n) weather symbol
(n) electrical signal
(n) telephone number
(n) registration number
(P)
(n) synchronous idle
SYN
(n) (comp) identifier
(n) extension number
(n) mistress
"No. 2"
(n) incoming signal
input signal
(n) (comp) optional
(n) time signature
(n) phonetic symbol
(n) (comp) decision symbol
(n) repeat sign
repetition mark
(n) (comp) directory assistance
(n) number sign
(n) (comp) numbering plan
(n) (comp) station-to-station (comms)
(n) alarm
(n) (comp) mandatory
(n) encoding (act of encoding a signal)
(n) (comp) sign position
(n) decoding
