Computer: A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Mordern computers have the ability to follow generalized sets of operations, called programs. These programs enable computers to perform an extremely wide range of tasks. A "complete" computer including the hardware, the operating system, and peripheral equiment required and used for "full" operation can be reffered to as computer system. Computers are used as control systems for a wide variety of industrial and consumer devices. This includes simple special purpose device like microwave ovens and remote controls, factory devices such as robots and computer-aided design, and also general purpose devices like personal computers and mobile devices such as smartphones. Early computers were only conceived as calculating devices. Since ancient times, simple manual devices like the abacus aided people in doing calculations. Early in the industrial revolution, some mechanical devices were built to automate long tedious tasks.
RAM: Random-Access Memory also know as RAM is a form of computer memory that can be read and changed in any order, typically used to store working data and machine code. A randomly-access memory device allows data items to be read or written in almost the same amount of time irrespective of the physical location of data inside the memory. In contrast, with other direct-access data storage media such as hard disk, cd-rw, dvd-rw and the older magnetic tapes and drum memore, the time required to read and write data items varies significantly depending on their physical location on the recording medium, due to mechanical limitations such as media rotation speed and arm movement. Ram contains multiplexing and demultiplexing circuitry to connect the data lines to the addressed storage for reading or writing the entry. Usually more than one bit of storage is accessed by the same address, and RAM devices often have multiple data lines and are said to be "8-bit" or "16-bit", etc. In today's technology, RAM takes the form of integrated circuit chips wich MOS memory cells. RAM is normally associated with volatile types of memory, where stored information is lost if power is removed, although non-volatile RAM has also been developed.
Video Card: A video card is an expansion card which generates a feed of output to a display device. Frequently, these are advertised as discrete or dedicated graphics card, emphasizing tje distinction between these and integrated graphics. At the core of both is the graphics processing unit, which is the main part that does the acutal computations, but should not be confused with the video card as a whole, although "GPU" is often used to refer to video cards. As an alternative to the use of video card, video hardware can be integrate into the motherboard, CPU, or a system-on-chip. Both approaches can be called integrated graphics. Motherboard-based implementations are sometimes called "on-board video." Video cards for desktop computers come in one of two size profiles, which can allow a graphics card to be added even to small-sized PCs. Some video cards are not of usual size, and are thus categorized as being low powered. Video cards profiles are based on height only, with low-profile cards taking us less than the height of a PCIe slot, some can be low as "half-height."
No lines are longer than 80 characters, TYVM. Other specified properties aren't being scored automatically at this time so this is not necessarily good news...