Bluejacking:

A kind of practical joke played out between Bluetooth-enabled devices, 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 is 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 -- the name can be anything from the sender's actual name to a clever nickname.
Bluejackers have devised a simple technique to surprise their victims: Instead of creating a legitimate name in the address book, the bluejacker's message takes the place of the name. The prank essentially erases the "from" part of the equation, allowing a user to send any sort of comment he wishes without indentifying himself.
Bluejacking is imprecise, however. Searching for other Bluetooth-enabled hardware might turn up a list of devices labeled with a series of numbers and letters. Unless the bluejacker's target has chosen to publicly identify his or her phone, or it's the only Bluetooth phone in the area, the bluejacker may have a hard time messaging his or her target on the first try.

Enter Current Date and Time:

To enter the current date or time click on a cell and type
=today() or =now().
Excel updates the result every time you open the sheet, so it’s always current.

Repeatability:

Repeatability is the variation in measurements taken by a single person or instrument on the same item and under the same conditions. A measurement may be said to be repeatable when this variation is smaller than some agreed limit. According to the Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results, repeatability conditions include:
• the same measurement procedure
• the same observer
• the same measuring instrument, used under the same conditions
• the same location
• Repetition over a short period of time.
Repeatability methods were developed by Bland and Altman (1986). The repeatability coefficient is a precision measure which represents the value below which the absolute difference between two repeated test results may be expected to lie with a probability of 95%. The standard deviation under repeatability conditions is part of precision and accuracy.

Enter URLs as Text:

To prevent Excel from converting written Internet addresses into hyperlinks, add an apostrophe to the beginning of the address.
For example - 'www.yahoo.com.

Also you can use the apostrophe for entering the functions also as text.
Ex:- '=today()

F1-F9 Key Commands for the Command Prompt:

Mentioned below F1- F9 key commands used in the Command prompt.

F1 / right arrow: Repeats the letters of the last command line, one by one.
F2: Displays a dialog asking user to “enter the char to copy up to” of the last command line
F3: Repeats the last command line
F4: Displays a dialog asking user to “enter the char to delete up to” of the last command line
F5: Goes back one command line
F6: Enters the traditional CTRL+Z (^z)
F7: Displays a menu with the command line history
F8: Cycles back through previous command lines (beginning with most recent)
F9: Displays a dialog asking user to enter a command number, where 0 is for first command line entered.
Alt+Enter: toggle fullScreen mode.
up/down: scroll thru/repeat previous entries
Esc: delete line

Copy Into:

"Copy Into" is a Lotus Notes mail template feature that enables you to select an existing Email/Calendar Entry/To-do, and create a new Email/Calendar Entry/To-do which automatically inherits information from the selected document. This is extremely useful, as it removes the need to manually copy and paste data from the selected document into the new one.

Let's say you get a memo from your manager. The memo discusses some details for an existing project, and requires you to call a meeting with the other recipients to discuss next steps. Rather than creating a new Calendar Entry for the meeting where you have to manually enter all the information, instead choose the action "Copy Into New - New Calendar Entry"


Lotus Notes prompts you for what type of Calendar Entry to create, and since this will involve others, you choose Meeting.


A new Calendar Entry is created for you with the Subject, Invitees, and Description fields automatically filled in for you.


The Required invitees will be the original Sender and all names that were in to To: field, and the Optional invitees will be all the names that were in the CC: field.

Now all you have to do is choose the date and time, and click Save and Send.

Dead Net:

The lowest costs for goods after all allowances are subtracted, also known as net-net.