How to put OSX symbols like command (⌘), shift (⇧) and others in html document

Once writing the last blog entry I have faced a need of putting OSX symbols in it. After looking around I found some:

• ⇧ (⇧) shift
• ⌃ (⌃) ctrl
• ⌘ (⌘) command
• ⌥ (⌥) option
• ⇥ (⇥) tab
• ⎋ (⎋) escape
•  () apple - only on Macs