Keyboard Shortcut Keys in photoshop

The following are some of the short cut keys that are available in Photoshop 5. Presumably most (if not all) of them should also be available in other versions of Photoshop. (Except where indicated, Mac users should substitute the Command key wherever the CTRL key is mentioned below.)
CTRL+A
Select All (Select menu)
CTRL+B
Adjust Colour Balance (Image menu)
CTRL+C
Copy (Edit menu)
Shift+CTRL+C
Copy Merged (Edit Menu)
CTRL+D
Deselect (Select menu)
Shift+CTRL+D
Reselect (Select menu)
CTRL+E
Merge Down (Layer menu)
Shift+CTRL+E
Merge Visible (Layer menu)
CTRL+F
Last Filter (Filter menu)
Shift+CTRL+F
fade (Filter menu)
CTRL+G
Group with Previous (Layer menu)
Shift+CTRL+G
Ungroup (Layer menu)
CTRL+H
Hide Edges (View menu)
Shift+CTRL+H
Hide Path (View menu)
CTRL+I
Adjust Invert (Image menu)
Shift+CTRL+I
Invert Selection (Select menu)
CTRL+J
New Layer via Copy (Layer menu)
Shift+CTRL+J
New Layer via Cut (Layer menu)
CTRL+K
General Preferences (File menu)
CTRL+L
Adjust Levels (Image menu)
Shift+CTRL+L
Adjust Auto Levels (Image menu)
CTRL+M
Adjust Curves (Image menu)
CTRL+N
New (File menu)
Shift+CTRL+N
New Layer (Layer menu)
CTRL+O
Open (File menu)
Alt+CTRL+O
Open As (File menu)
CTRL+P
Print (File menu)
Shift+CTRL+P
Page Setup (File menu)
CTRL+R
Show Rulers (View menu)
CTRL+S
Save (File menu)
Shift+CTRL+S
Save As (File menu)
Option+Command+S
Save a Copy (File menu - Mac only).
CTRL+T
Free Transform (Edit menu)
Shift+CTRL+T
Transform Again (Edit menu)
CTRL+U
Adjust Hue/Saturation (Image menu)
Shift+CTRL+U
Adjust Deaturate (Image menu)
CTRL+V
Paste (Edit menu)
Shift+CTRL+V
Paste Into (Edit menu)
CTRL+W
Close (File menu)
CTRL+X
Cut (Edit menu)
CTRL+Y
Preview - CYMK (View menu)
Shift+CTRL+Y
Gamut Warning (View menu)
CTRL+Z
Undo (Edit menu)
CTRL+0
Fit on Screen (View menu)
Shift+CTRL+0
Actual Pixels (View menu - windows only)
Alt+Cmd+0
Actual Pixels (View menu - mac only)
CTRL+]
Arrange - Bring Forward (Layer menu)
Shift+CTRL+]
Arrange - Bring to Front (Layer menu)
CTRL+[
Arrange - Send Backward (Layer menu)
Shift+CTRL+[
Arrange - Send to Back (Layer menu)
CTRL++
Zoom In (View menu)
CTRL+-
Zoom Out (View menu)
CTRL+;
Hide Guides (View menu)
Shift+CTRL+;
Snap to Guides (View menu)
Alt+CTRL+;
Lock Guides (View menu)
CTRL+"
Show Grid (View menu)
Shift+CTRL+"
Snap to Grid (View menu)