Computers

Punchcards predate the existence of electronic computers themselves; the first commercially available computers produced by what is now IBM used punchcards. They were popular because, for nearly 100 years, there was no form of storage that was both cheap and reliable to replace it. However, by the mid-70s, other forms of storage were more readily available, so punch card usage pretty much died out. To understand why they were undesirable with suitable alternatives, think of the size of almost any program you would want to use today. Now think of how you would express that data on a punch card. Even if you used hex codes to represent each byte of a program (most punch cards were used mainly to perform arithmetic on numbers), it could take thousands of holes to express that program. This would require the usage of either very large punch cards which would be awkward to load, cards with very small holes that could no longer be punched by hand and with more moving parts, or the loading of hundreds or thousands of cards, which could take hours.

AS the board and CPU execute programs, they send associated sound signals to the sound card on your computer. The sound card converts the digital signal into analogue and sends that signal to the external port(s). Assuming a speaker is plugged in, the signal is carried over wire to the speaker (or headphone) speaker, where a electromagnet is used to move the speaker cone. This produces sound which can be heard.

Electronic and Computer products often contain hazardous and toxic materials that pose environmental risks if they are landfill or incinerated. Televisions, video and computer monitor use cathode ray tubes (CRTs), which have major amounts of lead. Printed circuit boards contain primarily plastic and copper, and most have small amounts of chromium, lead solder, nickel, and zinc. In addition, many electronic products have batteries that often contain nickel, cadmium, and other heavy metals. I got this answer at: http://www.querycat.com/faq/8c0c29ee618938cca5bff62059766004.

Most of the users say that it is unsafe.

I'm making this statement on the report generated as of 14th May 2015.

There are two main forms of reproduction:

1) Asexual - In this, only a single parent is required. This is the form of reproduction in primitive organisms. The parent simply divides itself into two. The type of cell division is mitosis. The children produced are a genetic clone to the parent. Hence this is not favorable where genetic mutations are necessary.

2) Sexual - In this, two parents are required. This is the form of reproduction in higher organisms including humans. Each parent cell divided into 4 leading to cells with half the chromosome count(meiotic division). Then two meiotic cells fuse to form the zygote in which the original chromosome count is restored. It leads to genetic variation in the offsprings enabling them to survive better in the mutating environment.

``hard ware``

The return key is, in fact, the enter key.

look at the bar on top. if you look through it you may find what you need

Internet

The Internet evolved from ARPA/DARPA.

In general, computers do not solve engineering problems. Engineers solve engineering problems by using computers to perform complex calculations. In particular, engineers construct detailed mathematical models of their designs or proposed solutions to a problem and then use computers to perform analysis and/or simulation on the model. The objective is to determine whether the design will satisfy all the requirements of the problem to be solved. In most cases, it takes many steps of refinement to arrive at a solution that is both satisfactory and feasible to implement with real-world materials.

computers are categories into three. these are: 1) Supercomputer 2) Minicomputer 3) Microcomputer

the bios and the north bridge and south bridge chips on the motherboard. so their are more than one part to commutation on a computer

An output device, such as a monitor (screen), or a printer.

Some advantages of becoming a computer operator is that the earning potential is far greater as an operator than as a computer tech. In addition, there are a wealth of opportunities for a computer operator.

While many blogs and other websites review and compare laptops, some of the most respected and reliable sources offering comparisons of laptop models include PC Magazine, Consumer Reports and CNET.

The Open Systems Interconnection model (OSI model), which has 7 layers.

Device drivers. These are software programs and services which teach your operating system how to interface with the hardware components that are connected to it either internally (Graphics card, sound devices, hard drives, Network adapters like LAN or Wifi adapters, CD/DVD drives) or externally (computer screens, flash/thumbdrives, keyboards, mice, printers, etc)

Computer Bismarck happened in 1980.

Did you..

- plug it in ?

- hook up the power ?

- on what device are you using those speakers ?

- Is it ON ?

_ If its a computer .. Is the sound card detected ?

The OSI model has seven layers whereby each layer has its function. The Data Link Layer is responsible for addressing data messages so that they reach their destination correctly.

A computer is an electronic device that is used to convert raw data or meaningless data in meaningful information.

features of computer :-

1. automatic

2. speed

3. accuracy

4. versatility

5. diligence

6. memory

7. no intelligence

8. no feeling

Touchscreen computer monitors are becoming very popular today. They are now made by most major computer manufacturers like HP, Dell and Apple, and can be found for sale by retailers that sell computers and monitors such as Best Buy, New Egg, Amazon and eBay.