section a-a a-a

to send a cheque for payment

to send a credit

A-A-A conjugation structure

S-A(A-A) missile

A.A.A.

human-to-human transmission

spreading through human-to-human transmission

Clear To Send

clear to send circuit

Clear To Send CTS

clear-to-send circuit

CTLclear to send

invitation to send

request to send

RS Request to Send

RTS Request To Send

RTS request to send threshold

secondary request to send