Definitions

Alphabet: A set of letters or symbols in a fixed order, used to represent the basic sounds of a language; in particular, the set of letters from A to Z.

Street Sign: A sign visible from the street.

Advertisement: A notice or announcement in a public medium promoting a product, service, or event or publicizing a job vacancy.

Constellation: A group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure. Modern astronomers divide the sky into eighty-eight constellations with defined boundaries.

ASCII Symbols: (American Standard Code for Information Interchange) is the most common format for text files in computers and on the Internet. In an ASCII file, each alphabetic, numeric, or special character is represented with a 7-bit binary number (a string of seven 0s or 1s).

Electronic Symbols: Is a pictogram used to represent various electrical and electronic devices (such as wires, batteries, resistors, and transistors) in a schematic diagram of an electrical or electronic circuit. 

Morse Code: An alphabet or code in which letters are represented by combinations of long and short signals of light or sound.

American Sign Language: A form of sign language developed in the US and used also in English-speaking parts of Canada.

Glyph: A hieroglyphic character or symbol; a pictograph.