Credit: this blog post was inspired by and CSS styles for it were shamelessly ripped off of: Smart Quotes for Smart People website by Jason Santa-Maria.

Following is a list of key combinations for OS-X Latin standard keyboard that allow easy typing of some frequently-needed characters

Character Name Key Combo
© Copyright Sign. Option + g
™ Trade Mark Sign. Option + 2 (@)
® Registered Sign. Option + r
º Degree. Option + 0
… Horizontal Ellipses. Option + ;
∞ Infinity. Option + 5 (%)
≠ Not Equals. Option + =
≈ Almost equal to. Option + x
≤ Less-than or equals to. Option + <
≥ More-than or equals to. Option + >
ƒ Math: “function of” (Caution: it's a “Find” cmd key combo in many editors). Option + f
∑ Math: “sum of”. Option + w
– En-dash. Option + -
— Em-dash. Option + Shift + -
“ Left double quotation mark. Option + [
” Right double quotation mark. Option + Shift + [
‘ Left single quotation mark. Option + ]
’ Right single quotation mark / apostrophe. Option + Shift + ]
Apple! Option + Shift + k