Problem scenario
You want to know about the FHS in Linux. You see the /media directory (aka partition). What usually goes into /media?
Answer
CD-ROMs, DVD-ROMS, floppy disks etc. It is an optional directory that some Linuxes don't have. Page 212 of CompTIA Linux+ Complete Study Guide (by Roderick W. Smith published in 2010) by Sybex has more information