Explanation of POP . It's the …

(1) POP is short for Post Office Protocol, a protocol used to retrieve e-mail from a mail server. Most e-mail applications (sometimes called an e-mail client) use the POP protocol, although some can use the newer IMAP (Internet Message Access Protocol). There are two versions of POP. The first, called POP2, became a standard in the mid-80's and requires SMTP to send messages. The newer version, POP3, can be used with or without SMTP. (2) Pop is short for point of presence, an access point to the Internet. ISPs have typically multiple POPs. A point of presence is a physical location, either part of the facilities of a telecommunications provider that the ISP rents or a separate location from the telecommunications provider, that houses servers, routers, ATM switches and digital/analog call aggregators. (3) Pop is short for Programmed Operator (POP), a pseudo-opcode in a virtual machine language executed by an interpretive program. The Programmed Operator instructions provide the ability to define an instruction set for efficient encoding by calling subprograms into primary memory. (4) POP is short for picture-outside-picture POP is a feature found on some televisions that allows the user to divide the screen into two same-size pictures, enabling you to view a second program. Compare with picture-in-picture (PIP)

It's plaster of paris formed by the gypsum (caso4.2h2o)i.e.formed when gypsum is heated at 373k...on heating gypsum loses water moleclue n formes pop (caso4.1/2h20)...its a white powder on again moxing with water its gives a hard solid....i.e.mainly used as plaster by doctors to cure the broken bone....

I explained it as i don't know ur question .if u have any question then ask it

POP stands for plaster of paris. It's chemical formula is CaSO4.1/2 H2O.It is prepared by heating GYPSUM ( CaSO4.2H2O) at 373K or 100° C. The equation for it is as follows....... CaSO4.2H2O------->CaSO4.1/2H2O+3/2H2O. It's uses are as follows.................................... • it is used for plastering the fractured bones • it is used for making the caste of statues .. • it is used for making black board chalks and toys ....... ........... ........... .............. It's physical and chemical properties are as.. • it is a white coloured powder.• when it is heated above 100° C then it loses its water molecules and becomes anhydrous CaSO4.. • when water is added to it then it is converted into a hard mass that is GYPSUM. CaSO4.1/2H2O+3/2H2O-->CaSO2.2H2O.