tokens
21Security token — Several types of security tokens with a penny for scale …
22Token coin — In the study of numismatics, token coins or tokens are coin like objects used instead of coins. The field of tokens is part of exonumia. Tokens are used in place of coins and either have a denomination shown or implied by size, color or shape.… …
23Civil War token — Civil War store card Civil War tokens are token coins that were privately minted and distributed in the United States between 1862 and 1864. They were used mainly in the Northeast and Midwest. The widespread use of the tokens was a result of the… …
24Toronto Transit Commission fares — Obverse and reverse of the TTC single ride token introduced in 2006. On the Toronto Transit Commission, fares may be paid with a variety of media, the price of which may be determined by the age of the rider. Contents …
25Two-factor authentication — (TFA, T FA or 2FA) is an approach to authentication which requires the presentation of two different kinds of evidence that someone is who they say they are. It is a part of the broader family of multi factor authentication, which is a defense in …
26Communion token — A communion token from Crawford, South Lanarkshire, 1840 A communion token is a metal token issued to members of Presbyterian churches in order to provide them entrance to the Lord s Supper. There were many types issued in Scotland in the 18th… …
27Exonumia — is the study of coin like objects such as token coins and medals, and other items used in place of legal currency or for commemoration. This includes elongated coins, encased coins, souvenir medallions, tags, badges, counterstamped coins, wooden… …
28Proto-Keilschrift — Als Proto Keilschrift wird dasjenige Schreibsystem definiert, mit dessen Hilfe die archaischen Texte aus der späten Uruk Zeit (d. i. Uruk IV bis Uruk III) bis hin zur beginnenden frühdynastischen Zeit (fDyn I) geschrieben wurden, also die Schrift …
29Petri net — A Petri net (also known as a place/transition net or P/T net) is one of several mathematical modeling languages for the description of distributed systems. A Petri net is a directed bipartite graph, in which the nodes represent transitions (i.e.… …
30Octal game — The octal games form a significant subclass of impartial games studied in combinatorial game theory.[1][2] They are organized by a numeric coding system that enables a compact specification of a variety of game rules. Contents 1 Octal games… …
