A general rule of thumb is that if your economic model has no value judgements, it's positive economics, and if it does have value judgements it's normative economics, since to tell someone what he ought to do, you first have to judge what is best for him.
A subscriber identity module or subscriber identification module (SIM) is an integrated circuit that is intended to securely store the international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers).
Wiktionary(0.00 / 0 votes)Rate this definition: 1  SIM(Noun) A character in the PC game, The Sims. They played a flight sim all afternoon. 2  Sim(Noun) The generic term for characters in a popular PC video game, The Sims, that simulates aspects of a human social environment. They played a flight sim all afternoon.