Computers

The history of computer aided manufacturing (CAM) starts with the advent of numerically controlled (NC) machine tools. The first automated machine tool, in 1948, used punched paper cards to control the tool. Later, researchers at MIT experimented with punched paper tape and magnetic tape. They built the first true NC machine tool in 1952. The problem then, was how could the data be generated for controlling the NC machine tool? Douglas Ross, a mathematician working in the MIT Servomechanisms Lab, invented a programming language called APT (Automatically Programmed Tool). This was a huge breakthrough and actually one of the very first computer programming languages ever designed. It could be used to create NC instructions relatively quickly and easily. This was the birth of computer-aided manufacturing. While APT programs could simply be typed in on a teletype or keypunch machine, it was always the vision of Ross that a graphical input system would be used. Thus, the first computer aided design (CAD) systems were an outgrowth of the early CAM work with APT. Systems which allowed both the design of mechanical parts and the manufacturing with NC mill and lathe machines were designated CAD-CAM.

When a CPU receives an Interrupt Request (IRQ), it first checks if it must react to the interrupt. So-called Maskable Interrupts allow a programmer to specify that the CPU does ignore it, while Non-Maskeable Interrupt requests must be serviced.

It is important to note that an Interrupt is a way to communicate asynchronously with the CPU - very much like sending an email.

When you send an email to a person, you cannot know at which time the person reads the message, let alone when the person reacts.

A phone call, on the other hand is synchronous (happening at the same time): when I call you, you must answer right now.

Interrupts where introduced to allow tgis email-like communication with slower hardware, like a hard-disk. This way, the CPU can order something from the HD, like "go to this location", the CPU can then return to more important stuff, while the HD seeks. When the HD is done, it sends the CPU an IRQ, which tells the CPU "I am done, talk to me".

The CPU then does a so-called contex-switch, which is a rather costly operation: it must store all the data it was working on earlier in some secure way, normally on the stack and then begin to execute the so-called Interrupt Handler, a piece of software associated with the number of the IRQ.

After executing it, it can carry on doing what it did earlier (after having loaded all the data back into its registers).

The concept of IRQs make multi-tasking possible, here, the OS interrupts each process after its time-slice has expired.

The type of desk that works for you will depend on both the size and layout of your home office space. L-shaped desks are great for having both a work station and meeting station in the same place. If you are severely limited on space, you may want to consider a more basic computer desk or computer armoir.

Why yes, yes i am.

Integrated Drive Electronics

1 gigabyte = 1024 megabytes.

5 gigabytes = 5120 megabytes.

5000 megabytes = 4.883 gigabytes

the vacuum tube

The internal clock of a computer system is found on the motherboard. It is run by its own, independent battery, causing it to always run, even if the computer is turned off.

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it looks good in small size text.

A logic bomb is a type of malware designed to execute when a certain event or program is executed. Logic bombs run in memory so that they can constantly detect whether the event needed for them to deliver their payload is true.

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There are many different companies that manufacture 22" LCD monitors. Some of the most highly rated are Samsung, HP, Lenovo, Sharp and LG. Some of these companies also offer a widescreen model.

you can save videos by adding them to your favorites folder, then send them in an attachment in an e-mail to yourslef and then open the attachments and save them on your computer somewhere and you can watch them back!

If there is no available option to save videos off Internet, you can also use a 3rd party streaming video recorder to immediately download the video from sites, you are supposed to reocrd any videos from Youtube, dailymotion, metacafe, megavideo,etc.

What's more, you can convert the video to intended format for playback on desired devices like iPod, iPhone, blackberry, Apple Tv,etc and even audio format

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You can purchase a basic computer system for as cheap as $34, the Raspberry Pi. You can also get a free used computer from a range of websites (e.g. Gumtree).

If spam a great quantity of emails to someone or send spam/advertising emails to someone you risk having your email address blacklisted. This means when you go to send an email to someone instead of it going to their inbox it will be directed to their spam folder. Basically sending a bombardment of emails can result in getting your account filtered out by spam detectors.

It is people who are answering the questions; there are bots used for cleaning up the site and flagging bad answers.

For registered users (and not "drive by" visitors), you can click on the username at the bottom of an answer. This takes you to the user's profile and message board. Yes, real people answer questions here; this is one of the reasons why you may get more than one answer.

FIrst, you must register to a have your own email address, on a website like gmail

Second, you must login to your mailbox there

Third, you must click :compose

Forth, you must know the email address of the person/people you want to send an email to

and fill it in in the " to:" field

Fifth you must write in the contents of your email

If you want to you can attach files , and then you must click "Send".

It depends, just like Harddrives they come in different capacities, they will usually be advertise. Solid state drives normally have smaller capcities for there price though, because they are new(ish) alot fster smaller and quieter and it costs more to make them.

A cold boot is done by completely powering down the computer to off and then starting the computer fresh.

A warm boot is restarting the computer without powering the computer off.

As long as the new central processing unit is faster than the one your currently have, it will increase the speed of your computer.