To type an E that looks like a backward three, you can choose from several different characters. This symbol also can be copied and pasted into your Web browser or other software that takes text input.
The Quick Way
Open a blank document in your word processor. Type "0190" and then press "ALT-X" to transform this code into a backwards three.
You can use Microsoft Word to browse a variety of character styles. Click the "Insert" tab on the ribbon and then click "Symbol." A new window opens containing a long list of characters, from which you can choose several different characters which look like a backwards three. You will have the most choice if you use a standard font like Arial or Times New Roman.