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.
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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.