Glossary

bib2gls
an indexing application designed specifically for use with glossaries-extra.sty
GUI
graphical user interface
Look and Feel
the appearance (look) of Java applications and how the widgets behave (feel)
makeglossaries
a Perl script provided with the glossaries package which runs either makeindex or xindy, depending on the settings in the .aux file
makeglossaries-lite.lua
a Lua script provided with the glossaries package as a light-weight alternative to makeglossaries (the .lua extension may be omitted or replaced with .exe, according to the TeX distribution)
makeindex
an indexing application
xindy
an indexing application written in Perl