Handy Unicode Glyph's for Mac web work...

Command Key :: ⌘

UnicodeMap page :: http://www.unicodemap.org/details/0x2318/index.html

Control Key :: ⌃

UnicodeMap page :: http://www.unicodemap.org/details/0x2303/index.html

Power Key :: ⎋

UnicodeMap page :: http://www.unicodemap.org/details/0x238B/index.html

Eject Key :: ⏏

UnicodeMap page :: http://www.unicodemap.org/details/0x23CF/index.html

Opt/Alt Button :: ⌥

UnicodeMap page :: Details for Character 0x2325 - "⌥" from Unicode Map

Caps Lock Key :: ⇪

UnicodeMap page :: http://www.unicodemap.org/details/0x21EA/index.html

Shift Key :: ⇧

UnicodeMap page :: http://www.unicodemap.org/details/0x21E7/index.html

Return Key :: ↩

UnicodeMap page :: http://www.unicodemap.org/details/0x21A9/index.html

Page Up Key :: ⇞

UnicodeMap page :: http://www.unicodemap.org/details/0x21DE/index.html

Page Down Key :: ⇟

UnicodeMap page :: http://www.unicodemap.org/details/0x21DF/index.html

Delete (Backspace) Key :: ⌫

UnicodeMap page :: http://www.unicodemap.org/details/0x232B/index.html

Forward Delete Key :: ⌦

UnicodeMap page :: http://www.unicodemap.org/details/0x2326/index.html

Apple Logo Key ::  - Mac Browsers

UnicodeMap page :: http://www.unicodemap.org/details/0xF8FF/index.html

Tab forward Key :: ⇥

UnicodeMap page :: http://www.unicodemap.org/details/0x21E5/index.html

Tab back Key :: ⇤

UnicodeMap page :: http://www.unicodemap.org/details/0x21E4/index.html

There are several ways to enter these symbols in your web pages, for one of the more Mac ways, have a look at Entering Unicode Text and Symbols.