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Tech Terms: Hyper-Threading

Hyper-threading is a technology developed by Intel Corporation. It is used in certain Pentium 4 processors and all Intel Xeon processors. Hyper-threading technology, commonly referred to as “HT Technology,” enables the processor to execute two threads, or sets of instructions, at the same time. Since hyper-threading allows two streams to be executed in parallel, it is almost like having two separate processors working together.
While hyper-threading can improve processing performance, software must support multiple processors to take advantage of the technology. Fortunately, recent versions of both Windows and Linux support multiple processors and therefore benefit from hyper-threading. For example, a video playing in Windows Media Player should not be slowed down by a Web page loading in Internet Explorer. Hyper-threading allows the two programs to be processed as separate threads at the same time. However, individual programs can only take advantage of Intel’s HT Technology if they have been programmed to support multiple processors.

Source: http://techterms.com/definition/hyperthreading

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Tech Terms: Alert Box

An alert box, sometimes called a message box, is a small window that pops up on your screen to warn you that your computer is about to perform an operation with potentially damaging consequences. For example, when you choose to empty the Trash or Recycle Bin on your computer, an alert box may pop up, saying “Are you sure you want to permanently remove these items?” You are then given the choice to select “OK,” to delete the items, or “Cancel,” to prevent the items from being removed.

Alert boxes act as a safeguard for users, preventing us from doing things we wish we hadn’t. Perhaps the most common alert box is the one that pops up when you try to close a document without saving it. You’ll mostly likely see an alert box with the message, “Save changes to this document before closing?” You can select “Don’t Save,” to discard the changes, “Save,” to save the changes before closing the document, or “Cancel,” to cancel closing the document and continue working on it. Most alert boxes include the standard alert icon — a triangle with an exclamation point in the middle — to get your attention. However, not all alert boxes have multiple options, such as “Cancel” and “OK.” For example, an alert box may show up on your screen saying a program performed an illegal operation and has unexpectedly quit. When that happens, your only option is to select “OK” and then kick your computer for quitting the program before you had a chance to save your work.

Most alert boxes include the standard alert icon — a triangle with an exclamation point in the middle — to get your attention. However, not all alert boxes have multiple options, such as “Cancel” and “OK.” For example, an alert box may show up on your screen saying a program performed an illegal operation and has unexpectedly quit. When that happens, your only option is to select “OK” and then kick your computer for quitting the program before you had a chance to save your work.
Source: http://techterms.com/definition/alertbox