If you use Gmail you might have come across a situation where you wanted to enter a Tab in an email. This could be for formatting items in a list, to line up columns. (You could put the data into Excel and attach the spreadsheet but the user at the other end may not have Excel)
This is how the list looks before adding Tabs, for example I'll use a list of items purchased.
There's a little known Windows feature of adding characters by using their ASCII code. The way to do it is by holding ALT, and then entering the code of the character you want. You need to use the numeric keypad to enter these characters. The ASCII code for Tab is 009, so by holding down ALT and then entering 009 we get a Tab character. See http://www.wikihow.com/Type-Symbols-Using-the-ALT-Key
After entering the Tabs in the original email this is now how it looks: