.PLS files

Playlist files often have the extension .pls

It's the primary station stream link format of SHOUTcast, and was popularized by WinAmp.

The MIME type of these files is audio/x-scpls and they often look like:

[playlist]
numberofentries=1
File1=http://123.45.67.189:8222
Title1=(#1 - 555/2000) radio station Xyz - top 100 - all the hitzez
Length1=-1