Last time I bought a UTP cable, the only choice was CAT5 or even better CAT5e, which was for the faster networks at the time. The name UTP stands for ‘Unshielded Twisted Pair’.
Since I wanted to replace some older cables I started browsing and found a whole range of new options, so below is what I found as descriptions for these mumble-words: F/UTP, S/UTP, SF/UTP, S/FTP, F/FTP, U/FTP, U/UTP, plus also I found CAT6, CAT6a and even CAT7.
So, here is the update: