AIDS is the abbreviation1) of ACQUIRED IMMUNE DEFICIENCY SYNDROME.It is a complicated illness that may involve several phases.it is caused by a virus that can be passed from person to person.AIDS impairs the human body’s immune system,the system responsible for keeping off disease,and leaves ...
Since, as noted above, three-letter signals other than medical ones have now been abolished, given the increased use of radio for signalling by ships at sea, it is not likely that the set of signal flags will need to be expanded again to make room for more code groups: one could imagin...