RAM(Random Access Memory) is the internal memory of the CPU for storing data, program and program result. 

Note:- It is read/write memory which stores data until the machine is working. As soon as the machine is switched off, data is erased.

Telnet is a session layer protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual terminal connection. User data is interspersed in-band with Telnet control information in an 8-bit byte oriented data connection over the Transmission Control Protocol (TCP)

JavaScript is a high level dynamic, untyped and interpreted programming language. It has been standardized in the ECMA Script language specification.

Dynamic HTML (DHTML) is an umbrella term for a collection of technologies used together to create interactive and animated web sites by using a combination of a static markup language (such as HTML), a client-side scripting language (such as JavaScript), a presentation definition language (such as CSS), and the Document Object Model (DOM). 

Note:The application of DHTML was introduced by Microsoft with the release of Internet Explorer 4 in 1997.

A programming language such as FORTRAN or Pascal that enables a programmer to write programs that are more or less independent of a particular type of computer. Such languages are considered high-level because they are closer to human languages and further from machine languages.

JavaScript is most commonly used as a client side scripting language. This means that JavaScript code is written into an HTML page. 

Note: When a user requests an HTML page with JavaScript in it, the script is sent to the browser to do something with it.

A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software or a combination of both.

In Excel, move somewhere in a row you want to hide and press Ctrl+9. The entire current row is hidden and you don’t need to select the entire row, just have your cursor somewhere in the row.

POST stands for Power on Self Test. A power-on self-test (POST) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on.

The operating system that is self-contained in a device and resident in the ROM is Embedded Operating System. An embedded operating system is a specialised OS for use in the computers built into larger systems. 

Note: An embedded system is a computer that is part of a different kind of machine.