I had a need to get the computer name in my SAS programs and assign it to a macro. Although there are many methods, I found this one the easiest (for working on MS Windows):

    %let cname = “%sysget(computername)”;  

There are other ways such as:

    filename getinfo PIPE “hostname” ;
    data _null_ ;
    infile getinfo ;
    input ;
    put _infile_ ;
    run ;

[as an aside, this works because 'hostname' is a command whereas trying to use 'computername' will not work because it is a system variable].

and

    filename getcmd pipe ‘net config workstation’;
    data theds(keep=theline);
    length theline $200;
    infile getcmd length=lenvar;
    input @1 theline $varying. lenvar;
    run;

    [then parse out pieces you want]

and

     %Put computername<%sysget(computername)>;

    [again, parse out what you need]
    [also, I don’t think this one works on Unix]