without Internet Explorer,
in 1280 x 960 resolution
We have seen contributors use the "Other" format category for discography entries as the equivalent of "I don't know, but I have to select something". However, that's NOT what that option is for. It is intended for comparably rare and "exotic" formats not covered by the usual categories, like for example 8-track cartridges or USB sticks. As such, releases categorised as "Other" should always include additional information in the version description field (and optionally the additional notes for yet further details), specifying what exactly this "other" is. Example. Again, it is not to be used for when the format is simply unknown to the user. If the format is not known or not reasonably certain, the entry shouldn't be added. The format is -along with the title, release year and complete tracklist- a minimum requirement for a discography entry. If one of those things is missing, use the additional info field on band pages. Example.
On a related note, I have observed an alarming number of cases where people select "CD" for entirely digital releases. While plain old laziness or error is obviously not to be ruled out, I assume that this is at least partly based on the practise of referring to any sort of release as a "(demo/full-length/etc.-)CD" in casual speech. While that is hardly a surprising phenomenon in natural language use, for the purposes of this site, when we say "CD", we mean an actual compact disc. Be specific and literal. Otherwise the whole release categorisation becomes a misleading mess.