bash-completion vs MarkReader

bash-completion is a shell script that enables tab completion functionality in the bash shell for a large number of shell commands and applications. It makes using the command line faster and more convenient.

MarkReader is a free, open-source document viewer and annotation tool. It allows users to view PDFs, Word docs, PPTs and more while adding highlights, notes, bookmarks and annotations. Useful for reviewing documents, collaborating with others, and organizing research.