The Symbol font is typically pre-installed on most modern computers as part of the system font library provided by Microsoft or Apple . If it is missing, you can find various versions for download: Symbol Font - not working - Apple Support Community

Symbols for infinity (∞), partial derivatives (∂), gradients (∇), and sums (∑).

Introduction The symbol "tt"—two lowercase t characters together—appears in different contexts across typography, computing, and linguistics. This essay examines its meanings, uses, and cultural associations, focusing on its role in monospaced (typewriter-like) fonts often labeled "tt" (short for "teletype" or "typewriter") and the specific "tt" notation used in web and software contexts to indicate fixed-width fonts.

For example, typing an "a" in Symbol TT produces the Greek letter alpha (), while a "b" produces beta ( β ). Key Technical Characteristics: Format: TrueType (indicated by the "TT" in the name). Style: Regular (Standard weight, not bold or italic). Typeface Category: Pi or Symbol font.