Almost all current and old browsers use the Cache
feature to allow for fast loading and viewing of pages you have
already been to. This will sometimes cause people to see old versions
of your page. To tell browsers when to get a newer copy of your site,
you should use following tags:
<META http-equiv="Expires"
content="Thu, 22 Dec 1925 1:00:00 GMT">
<META http-equiv="Pragma"
content="no-cache">
These meta tags should be placed in between your
<head> and </head> tags. Also, the specified date should be a
date in the past so that the browser will immediately get rid of the
cached copy or not keep it at all. It is also best to use both tags
because most browsers understand the "Expires" tag; however, some
older browsers may still look for the "no-cache" tag.
Second Article
Computers: A Basic Introduction
 |
by: Roger A. Pendey
|
When you mention the word "technology," most people think about computers. Virtually every facet of our lives has some
computerized component. The appliances in our homes have
microprocessors built into them, as do our televisions. Even our cars have a computer. However, the computer that everyone thinks of first is typically the personal computer, or PC.
Computer, a "general purpose" tool, has a microprocessor to
work efficiently. There are different parts of a computer
system: a hard disk, a modem, etc. that works together. A
PC can be used for different purposes. It can be used for
sending e-mail, playing games, browsing the web, etc.
Let take a closer look at the main components of the PC or typical desktop computer.
Central processing unit (CPU): The microprocessor "brain" of
the computer system is referred to as the central processing
unit. The CPU oversees everything that a computer does.
Memory: This is very fast storage used to hold data. It has to be fast as it connects directly to the microprocessor.
There are several specific types of memory in a computer:
Random-access memory (RAM): Used to temporarily store
information that the computer is currently working with.
Read Only Memory: It stores the important data that does
not change. It is a permanent storage device and helps in
computer booting.
Basic input/output system (BIOS): A type of ROM that is
used by the computer to establish basic communication when
the computer is first turned on.
Caching: is used to temporarily store a copy of information that has been requested by computer.
Virtual memory: Free space on a hard disk used to
temporarily store data and swap it in and out of RAM.
Motherboard: This is the main board in the computer that has
the processor, the RAM, the BIOS ROM, the timing and
control, the interrupt and direct memory access hardware and
the keyboard interface on it which are connected to it
through the secondary connection.
Soundcard: A peripheral device in the form of a card used for producing sound and music. Although PCs come with a
built-in speaker, it was usually tied to the CPU and does
not do a good job of reproducing complex sounds. All
soundcards have connectors for speakers.
Hard drive: This is the main storage device of a computer. It stores information including the OS that allows you to
access it all. Most common OS for PCs is Microsoft Windows.
And Apple computers use the Macintosh operating system.
Other drives: The majority of computers also make use of
floppy disk and CD drives. These vary from system to system,
however all work the same way, reading information stored
on disks. These are necessary for maintaining and updating
the computer's software and operating system.
These are a few key components required to make a computer system. Lastly, it is difficult to live without computers.
Computers have changed our lives.
Download of the Week |
|
AScrape
At-A-Glance Auction Monitoring on Your Desktop. AScrape is a stand-alone Windows application which allows you to keep track of Ebay auctions.
AScrape has a color-coded item list.
Green - item is open for bidding.
Red - item has less than an hour before close.
Grey - item is closed.
Download AScrape
|
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hat a hornets nest I stirred up last week with my comments on illegal immigration! Many folks agreed with me and just as many disagreed vehemently.
hese two are representative of the comments I received. 
personally think that's a rather childish way to handle your disagreements and leads me to believe these folks can't have many friends. Do you end a friendship with someone every time you disagree?
e that as it may, I make no apologies my statements last week. That's how I feel about it period. However, I think some of you may have misunderstood the point I was trying to make. I don't have a problem with anybody entering this country legally, but when you cross our borders illegally, you deserve to be shot.
nce again, here's that link to that petition. 
