Every time an acronym is used for the first time, the glossaries package (GP) includes the long form in the text. I don't want GP to do that (the abbreviations are clear/they can be looked up in the list).
I now solved it using \hphantom{all acronyms} somewhere on the first pages, but I bet there is a better solution to this.
\documentclass{article}
\usepackage[nopostdot,nogroupskip,nonumberlist]{glossaries}
\newacronym{OSA}{OSA}{Old South Arabian}
\newacronym{MSA}{MSA}{Modern South Aramaic}
\begin{document}
Some text about how interesting \gls{OSA} and \gls{MSA} are. And I want them ALWAYS to be abbreviated as \gls{OSA} and \gls{MSA}.
\end{document}