For LCARS fonts, you can also use Helvetica Ultra Condensed (also mentioned by Memory Alpha within the page @Shran provided a link to). You could also use Arial and Arial Narrow (or Liberation Sans / Liberation Sans Narrow, if you want to use OpenSource fonts) that make up good Trek fonts (and are easy to read).
LCARS normally uses majuscules only. Depending on the language you are writing in (there are some that do use majuscules more extensively than english, for example) you might find it easier to use the full set of letters.