[gitmo]

C#.NET by far (if you want a job).

Yep. That's where the job market is.

There are maintenance jobs for COBOL slingers. The old mainframers are dying off or retiring.

[AppyPappy]

We still run COBOL on unix. Mostly we use PL/SQL.

But the real question is “How many languages do you know?”

I routinely write Unix shell scripts, SAS, SQR, PL/SQL, COBOL, C, VBScript, Office VB and Javascript. Java programmers are the most highly sought but Java has become a security nightmare.