Can someone tell me what these icons mean?

[friendlyone20]

Here is a picture

I know one means Wifi and one is for the battery but what do the other ones mean. This computer is an Asus Zenbook if that's helpful

 

[anbello262]

The cilinder means HDD (hard disk) is being used. The lock with the A is CAPS LOCK in the keyboard, while the one with the 1 is NUM LOCK on the keyboard.
Not sure about the light bulb.

 

[USAFRet]

L-R
Power, Battery, hard drive, WiFi, Caps lock, Numlock

 

[friendlyone20]

Thank you both for the quick responses. Unfortunately I could only choose one answer, but you both were helpful.