The GVO uses a series of 'icons' next to items to show what they are. Below is a list of each icon used with an explanation of what it means.
Home Page (takes you to the main screen)
Calendar on the home page or a Meeting if in a folder
A 'Room' (see help on Rooms)
Tasks
Folder with no restrictions
Folder with restrictions
Spreadsheet
WORD or PDF Document
Page (may contain text and attached files)
File (single file with description)