There are 104 keys on a standard US keyboard that works with Microsoft Windows products; otherwise the computer keyboard has 101 keys.
A standard piano has 88 keys, though different keyboards may have fewer, particularly electronic versions.
There are 61 keys on a standard 61-key piano keyboard.
Why the window key in keyboard?
depends, mines 78
eight key's
Five
The lowest key on a standard piano keyboard is the A0 key, which is the first key on the left side of the keyboard.
keyboard
104.
If your keyboard is missing a key, press the key-less spot very lightly when used, or try to place the key back on, or at best get a new keyboard.
COMPUTER KEYBOARD KEY MEANINGS
To make an apostrophe on a keyboard, press the key beside the "enter" key on the right hand side of the keyboard.
It is usually on the key above the Enter (or Return) key on the keyboard.