grammaticality - Can you use an article in front of the word "software"?

Can you say "a software" or "the software"? E.g.

That is how you use the software.

Answer

Software is uncountable which means that it does not accept the indefinite article "a". In some cases, you can say "some" to convey this more indefinite meaning. It is perfectly acceptable to use a definite article on an uncountable noun and say "the software".

Note: In more rare cases "a software" can be used to denote "a piece of software". Piece, being countable, allows this to happen. Another example is that while the word beer is typically uncountable, "a beer", often comes to mean "a glass of beer".