A USB flash drive is a data storage device that includes flash memory with an integrated Universal Serial Bus (USB) interface. USB flash drives are typically removable and rewritable, and physically much smaller than an optical disc.RAMRandom-Access Memory is a form of computer data storage. A random-access device allows stored data to be accessed directly in any random order. In contrast, other data storage media such as hard disks, CDs, DVDs and magnetic tape, as well as early primary memory types such as drum memory, read and write data onlyin a predetermined order, consecutively, because of mechanical design limitations. Therefore, the time to access a given data location varies significantly depending on its physical location.Using Pendrive asRAM of computer , will help in increasing the performance of the computer. Here you have to use a USB pendrive or flashdrive, which can be used as RAM of your computer.How to use USB pen drive as RAM in Windows XP -1. First connect your pen drive to computer.Note that pen drive should be at least of 1GB.2. Now right click on the my computer and then click properties.3. Click on Advanced Tab and then Performance.4. Now click on Advanced and then click onVirtual Memory.5. Select your pen drive icon and click Custom size.6. Now view the memory available in your pen drive and note it down then click on OK.7.Restart your computerand enjoy your fast system.How to use USB pen drive as RAM in Windows Vista and Windows 7-1. Insert your pen drive andFormat it.2. Right click on your pen drive and click onProperties.3. Now click on Ready boost tab and then Use this device.4. Choose maximum space to reserve system speed then click on OK and Apply.