Computer Power Supply

Power supply of the computer supplies power to a computer. A power supply converts 100-240 V AC Power (Depending on the power supplied by the power companies) from the mains to low-voltage DC power ( + 5 VDC & +12 VDC)for the internal components of the computer. Normally Power Supplies has the switch to change between 230 V and 115 V. Some power supplies also come with automatic sensors that switch input voltage automatically, or are able to accept any voltage between those limits.
Today power supplies are built in ATX form factor .The Watts of the power supply ranges from 300 W to 500 W for the normal computers.For server machines and the systems having multiple processors ,many hard discs and multiple graphic cards ,the power supply is upto 2KW .When you look in side of a power supply ,you will see a complex arrangement of electrical components, including diodes ,transistors , transformers ,capacitors and resistances .Heat sinks are used to absorb head and fans are used for cooling and ventilation.

Finance Software

For the purpose of Money Management a Company requires a Finance Software .
One must narrow down the choices for the selection of financial software by knowing well what options for this particular software will be required by you.
You must question yourself that do you need to manage a variety of accounts, investments and financial future plan , or only the ability of the software for cash flow mean cash in and out.
You can manage your money when you are away from your office , this thing can be done by having access to your financial data online. Basic financial software must have the ability to automate tasks and saves hours of time compared to manual accounting. One must learn about the features and prices for a variety of small business accounting software packages .
Software that helps to keep receipts organized while you are on the go ensures that you get reimbursed for expense report items.
The financial Software may of following types

Basic Financial Software
Fully Featured Financial Software
Online Financial Software

Windows 7 from Microsoft

So now comes the Microsoft’s Windows 7 but kindly note that its features are just as introduction and subject to change. Also some features of Windows 7, like the ability to watch and record live TV or navigation through the use of "touch," may require advanced or additional hardware.
Here are some of these new features
1: Improved taskbar and full-screen previews
The taskbar is located at the bottom of your screen and it is normally used to switch between the applications you open. In Windows 7 one can set the order in which the icons appear . They're easier to see, too. Click once on the new large icons or bigger preview thumbnails and you're ready to go. You can even see a full screen preview before switching to the window
2: Jump Lists
In Windows 7, Microsoft focused on keeping the things one use most right in front of him . One example: The new Jump List feature. If some one want to see the files he have used recently, he just right clicks on the icon on his taskbar and on right-clicking on the Word icon windows will show him most recent documents.
3: Internet Explorer 8
Internet Explorer 8 Beta 2 in Windows 7 helps you do what you want online, faster. With innovations to the address bar, search, tabs, and the Favorites bar, Internet Explorer 8 brings more information, with less effort.

Printers

Printers or the Printing Devices for the Personal Computers have different types like it may be Ink Jet Printers or may the Laser Printers. Both types have different technology for the Printing .The Inkjet printers use the inks in their Cartridges where as Laser Printers use Toner Powder for the printing purpose.

In early ages when some one needed to print a color output then a Ink jet printer was required as Ink jet printers were available in Color printing options.Other Color Printers of Laser quality were also there but these were very expensive.

In case Black printing is required then you have two options,that are, you can use Inkjet Printers or you can use Laser Printers.If you concerned with cost of ownership then Inkjet Printers will be fine but if you are concerned with the cost of usage it is true that the Inkjet printers are not good,that is why market for Laser Printers is catching fire.

So if the Black Printing is required then Laser will be a good choice ,but if Color printing is required then Inkjet Printer will be a good choice.

Low Frequency Verses High Frequency UPS

Purchase of Uninteruptable Power(UPS) Supply is very tricky.There are many topologies for the UPS like Off Line , Line Interactive and ON line UPS. When you go beyond 5000VA ,Line Interactive UPS does not suit you due its high price , and if you are going to purchase UPS below 750 VA ,it is not recomended to buy ON line UPS.

It means that if you want to purchase UPS below 750 VA you may go for OFF Line UPS .

Before making any decision about UPS topology, it is important to understand the requirements of the equipment to be protected and the environment in which the UPS will be installed. After undersatnding these basic requirements you can decide which UPS topology will be the best that serve the application.

In ON Line UPS size of the UPS’s transformers may be different for High and Low frequency for example for a 5 kVA UPS, a low frequency transformer weighs about 130 lbs.
The same transformer operating at a higher frequency, weighs may be only 9 lbs., which the size and weight of the UPS substantially.

Un Interruptible Power Supply

Un Interruptible Power Supply or simply UPS, are now the essential part of the daily life in the countries where Power Failure is very common. In the beginning the UPS were very expensive so they were used only with the very expensive equipment which requires continuous supply of power. As the UPS became cheaper its usage expanded and they became an essential piece of equipment for Data Centers and Business Computers UPS are also being used now with Personal Computers, Entertainment systems etc etc.

The size of UPS depends upon its capacity ,the capacity can be from 200 VA to many Hundered VA. Normally UPS are used with Dry Batteries but it depends on the user .Dry Batteries are used in it as they are maintenance free and no harmful fumes comes out of it. When wet batteries are used with UPS ,it must be understood that these wet batteries require maintenance and these are harmful for the health of humans when they are placed inside the room due to their harmful fumes.
By type they can be Off Line ,On Line and Line Interactive.Off Line UPS are normally cheap in price.

Computer Hard Discs

The storage of the data is a very critical task. Different medias are used for the storage of data like Floppy discs,Hard discs,Writable CDs, Writeable DVDS,Tape Drives ,DAT Drives etc. Hard discs or Hard Disc Drives or simply HDD were introduced in IBM Machines in 1956.

Now a Days HDD are also used in Digital Video Recorders , Digital Audio Players and ,Digital Cameras .It was 2005 when SAMSUNG AND Nokia used Hard Discs in Mobile Phones . To secure Data on Networks NAS (Network Attached Storage ) and SAN ( Storage Area Network ) Hard discs are used.

When you talk about form factor of HDD ,it means the size of the hard disc ,there are many sizes like in 1979 the size was 8 Inches ,then in 1980 Seagate introduced 5.25 Inches HDDs .In 1984 3.5 Inch Hard Drive was introduced . 2.5 Inch HDD was introduced by PrairieTek in 1988. Then for Digital Audio Players 1.8 Inch Hard Disc was introduced . Now a Days the smallest form factor is 0.85 Inch used for Mobile Phones.