what is BlueJacking?

bluejacking takes advantage of a loophole in the technology's messaging options that allows a user to send unsolicited messages to other nearby Bluetooth owners.
a bluejacker will most likely camp out in crowded areas like shopping malls, airports and subway systems to find victims places with a potentially high percentage of people with Bluetooth-enabled devices
Bluetooth technology operates by using low-power radio waves, communicating on a frequency of 2.45 gigahertz.
This special frequency is also known as the ISM band, an open, unlicensed band set aside for industrial, scientific and medical devices. When a number of Bluetooth devices are switched on in the same area they all share the same ISM band and can locate and communicate with each other, much like a pair of walkie talkies tuned to the same frequency are able to link up
Bluetooth technology users take advantage of this ability to network with other phones
and can send text messages or electronic business cards to each other. To send information to another party, the user creates a personal contact name in his or her phone's address book This is know as BlueJacking....

Reasons To Switch To Gmail

1. Gmail spam filters block 99% of the spam that usually makes it to your inbox
2.With Gmail you get to keep your old email account, and all incoming emails will be forwarded to your new Gmail account . Also, emails that you send from your new account will have your old email account in the from area

3.You can create Word docs, PDF’s and spread sheets with Gmail via the use of
google docs
4.Gmail allows you to schedule events with the Google Calendar that will notify you by email to remind you of an appointment or meeting. It can also send a reminder to the person or persons that you will be meeting with
5.All your emails are online which means that you access your emails from anywhere, not just one computer
6.you will never have to delete an email again.

introduction to USB 3.0

Universal Serial Bus USB 3.0 it works more faster than the USB 2.0
USB 3.0 is 10 times faster than the 12Mbps limit of the 2.0,USB 3.0 just look like USB 2.0
USB 2.0 just worked of off four lines a pair for in/out data transfer, one line for power, and the last for grounding
USB 3.0 adds five new lines (the cable is noticeably thicker)two new lanes will be dedicated to transmit data, while another pair will handle receiving data. This not only accounts for the significant speed boost, but also allows USB 3.0 to both read and write at the same time from your portable storage device
(note)the cable will be about as thick as a ethernet cable

how to check the (SMPS) is working or not

Some time in our system SMPS will not work
so we have one option to check SMPS is working or not
take a copper wire or pin in the end of the SMPS we have group of wires with plastic cap
insert one end of the copper wire in green wire end and another one in black wire end in the plastic cap and switch on the SMPS if the fan will start run SMPS is in good condition otherwise purchase new SMPS