+ * .7z -- Non-mainstream user of a mainstream OS
+
+
+=== Old Skool ===
+
+ * .lzh -- MS-DOS or FidoNET, should probably stop playing with computers
+ * .arj -- Lame FidoNET-era user
+ * .lha -- Conservative Amiga user
+ * .lzx -- Progressive Amiga user
+ * .xpk -- Advanced Amiga user
+
+
+=== UN*X family ===