### signal | symbol:

Identifier
* always refer to variables from the lexical environment.
* are a specialized type of label, created according to rules, but names nevertheless
  - an enormously powerful tool for communication within and between communities
  - nonterminal symbols, string constants are terminals
  - sequences of letters and digits
* begin with a letter, followed by any number of letters or digits.
* serve as headings to organize information under
  - the primary indices into directories

### signal | symbol | identifier:

Object identifier
* are, basically, strings of numbers.
* figure in kernel software, which takes several years to write, test, and refine.

### signal | symbol:

Logo
* are a proposed industry standard to be printed on all produce boxes
  - an integral part of an association's image
  - emblems
  - logic
  - one of the most important tools for company recognition
  - programming language
  - sacred, untouchable icons in corporate culture
  - to graphic design as poems are to literature
* are trademarks of their respective companies
  - owners
* can be symbols or lettering or combinations of both
  - include graphic elements, type or both
  - mean word, verb, law, fundamental principle, energy, and so forth
  - simply be text presented to convey a company's image
* comes vertically to the realm of creation.
* graphically symbolize an organization, company, publication, product, or service.
* have their varying uses, whether to mark territory, advertise a clan, or just to show off.
* provide ways for people to understand brands, and they evoke deep brand meanings.
+ Logo (programming language): Programming languages
  * There are 170 versions of Logo. Many of them are open source and free. There are three Logo textbooks that can be downloaded free. Logo is usually an interpreted language.
  * Most logos are very simple drawings with only a small number of colors. Some logos are only black and white.

Mantle
* Identify the construction of different mantle styles.
* are albums
  - epidermises
  - layers
  - part of lithospheres
  - shelfs
* plumes and episodic crustal growth
  - control magnetic reversal frequency

### signal | symbol:

Medal
* are the reward that a winery gets when they have done their job well.
* can denote honorable deeds as well as ones that are questionable or disreputable.
* generally signify service in an operational area or for an organization.
* glisten on the shoulders of women and men.
* is awards
  - jewelry
  - tokens
+ Ireland at the Olympics, Medal tables: Nations at the Olympics
  * The following tables include medals won by athletes on Irish teams together with one poet. All medals are from the Summer Games. Ireland's best result at the Winter Games was fourth, by Clifton Wrottesley in the Men's Skeleton in 2002 at Salt Lake City.

Monogram
* are symbols.
* come in a variety of styles in one, two or three letters.

Numeral
* All numerals are Arabic.
* Quickly convert between Roman and Arabic numerals.
* are 'small cap numerals', lining but lower than cap height
  - an invention of man
  - in Sanskrit
  - notation
  - on the basis of twenty, the number of fingers on a person's hands and feet
  - parts of speech
  - valid to use in passwords
* follow the nouns they modify.
* precede letters.
* serve as shorthand for amateur radio jocks.