Heureka's Search Results categorizations are listed below by extension.

Category	Extensions
Email	eml, emlx, msg
Text	asp, eng, application, log, lrc, lst, opml, reg, rep, rtf, srt, sub, txt, text, xml, xmp
Word Processing	doc, docx, docm, dot, dotx, dotm, odt, pages, wpd, ott, oth, odm
Spreadsheet	ods, ots, numbers, xls, xlsx, wk1, wks, xlt, sdc, sxc
PDF	pdf, pdfx
Graphics/Image	bmp, ai, pub, dxf, emf, eps, gif, jpeg, jpg, pcx, psd, sgf, sgv, tga, tif, tiff, wmf, cdr, csh, csl, drw, emz, odg, pic, sda, swf, wmf, cpt, ico, icon, png
Presentation	odp, odg, otp, ppt, pps, pot, pptx, pptm, potx, potm, keynote
Audio Visual	3ga, aac, aiff, amr, ape, arf, asf, asx, cda, dvf, flac, gp3, gp4, gp5, gpx, logic, m4, m4a, m4b, m4p, m4r, m4v, midi, mp3, ogg, pcm, rec, snd, sng, uax, wav, wma, wp, 264, 3g2, 3gp, avi, bik, dash, dat, dvr, flv, h264, m2t, m2ts, mkv, mod, mov, mp4, mpeg, mpg, mswmm, mts, ogv, prproj, rmvb, tod, tp, ts, vob, webm, wmv
Compressed/Encrypted	zip, rar, .7z, 7ip, tar, gzip, asec, crypt, ksd, pfx, pkpass, rem, tc, gz, cab, jar, sit, tisx, sitd, sisx, tar.gz, webarchive
Other	All other extensions
Compressed Files	001, 7z, 7zip, a00, a01, a02, a03, a04, a05, ace, air1, apk, appx, arc, arj, asec, bar, bin, c00, c01, cab, cbr, cbz, cso, deb, dlc, gz, gzip, hgx, inv, ipa, isz, jar, msu, nbh, pak, rar, prm, sis, sisx, sit, sitx, sitd, tar, tar.gx, tgx, uax, webarchive, xap, z01, z02, zip, zipx, zipp

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