What is the full form of SIM ?

Sim Description:
SIM full form or meaning is subscriber identity module.
However, it is also known as the subscriber identification module.
The subscriber identity module is an integrated circuit that runs a card operating system.
This system is used to securely store the international mobile subscriber identity or IMSI number along with its related key.
Mobile phones and computers are mobile telephony devices on which subscribers are authenticated and identified. It is done by IMSI and related keys.
Contact information is also stored on various SIM cards. These subscriber identity module cards are used on global systems for mobile communication phones, for CDMA phones and these are only required for the long term evolution of capable handsets.
Subscriber identity module cards can be used in satellite phones, computers, cameras, smartwatches etc.
This subscriber identity module is a part of the function of a universal integrated circuit card or UICC physical smart card. These smart cards are made of PVC with embedded contacts as well as semiconductors.
Subscriber identity module cards are transferable between various mobile devices.
The first-ever universal integrated circuit card or UICC smart card has the size of a credit card. Later the size was reduced many times which normally kept the electrical contacts as same as before. It was for a larger card that can be cut down to a smaller size.
Serial number or ICCID, international mobile subscriber identity or IMSI number, security authentication and ciphering information, a list of the services that the user has access to, two passwords that are personal identification number for ordinary use and personal unblocking key for PIN unblocking, temporary information related to the local network in a subscriber identity module.
The subscriber identity module card is like a smart card that is made of a silicon integrated circuit or IC chip.
In the late 1960s, this idea of incorporating a silicon chip onto a plastic card was originated. Since then MOS integrated circuit chips with MOS memory technologies were used by smart cards such as flash memory, EEPROM etc.
In the specification along with the number TS 11.11 the European telecommunication standards institute