Universal set.

The universal set is the set of all possible elements under consideration.

You can have a universal set of all people, or all bird species, or all numbers or whatever. You can even have a universal set of all people and all bird species and all numbers as one big set.

The Java programming language is represented by the basic source character set from the US variant of the international 7-bit character set ISO 646-1983 called ASCII (ANSI3.4-1968). This is the same character set used by both C and C++ and also by the vast majority of high and low level programming languages. To use an extended character set for source code, the programming environment needs to map the extended character set into the basic source set. This can be achieved in several ways, such as by utilising universal character names.

UC stands for University of California.

Example: UCLA stands for University of California Los Angeles

"Universe" and "universal set" are two unrelated concepts.