Wednesday, April 22, 2009

LAST LESSON - APRIL 29, 2009


USB FLASH DRIVES

A USB flash drive consists of a NAND-type flash memory data storage device integrated with a USB (universal serial bus) interface. USB flash drives are typically removable and rewritable, much smaller than a floppy disk (1 to 4 inches or 2.5 to 10 cm), and most USB flash drives weigh less than an ounce (28g). Storage capacities typically range from 64 MB to 128 GB with steady improvements in size and price per gigabyte. Some allow 1 million write or erase cycles and have 10-year data retention, connected by USB 1.1 or USB 2.0.

USB flash drives offer potential advantages over other portable storage devices, particularly floppy disks or the COMPACT DISC (CD). They have a more compact shape, operate faster, hold much more data, have a more durable design, and operate more reliably due to their lack of moving parts.

Additionally, it has become increasingly common for computers to be sold without floppy disk drives. USB ports, on the other hand, appear on almost every current mainstream PC and laptop. These types of drives use the USB mass storage standard, supported natively by modern operating systems such as Windows, Mac OS X, Linux, and other Unix-like systems.

Nothing actually moves in a flash drive: the term drive persists because computers read and write flash-drive data using the same system commands as for a mechanical disk drive, with the storage appearing to the computer operating system and user interface as just another drive.

A flash drive consists of a small printed circuit board protected inside a plastic, metal, or rubberised case, robust enough for carrying with no additional protection—in a pocket or on a key chain, for example. The USB connector is protected by a removable cap or by retracting into the body of the drive, although it is not liable to be damaged if exposed. Most flash drives use a standard type-A USB connection allowing plugging into a port on a personal computer.

You can transfer photos from your camera directly to your USB Flash Drive as well.

CREATING A TABLE

There are many ways to insert tables in your Word document. However, the quickest way to create a table from scratch is to use the INSERT TABLE/TABLE toolbar button.

To insert a table using this method, simply click the Insert Table/Table toolbar button when your cursor is positioned at the place in your document where you would like the table to begin.

A grid will pop up allowing you to select how many rows and columns you would like your table to contain. Simply use your mouse to select the number of rows and columns by highlighting the boxes (text at the bottom of the grid will indicate what your selection is). When you have specified the correct number of rows and columns, simply click once, and your table will be inserted.

While this method will create a table with uniform columns and rows, you can still customize your table after it is inserted by right-clicking on the table handle (the double-headed arrow at the top left corner of the table) and using the options on the shortcut menu to make changes.

You can also click VIEW/Toolbars and then click on Tables and Borders to customize the table.

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