Yeah. Both Ћирилица and Latinica. On the internet, pretty much everyone writes with the Latin alphabet, except for the nationalists who wish to, as the say, preserve the Cyrillic alphabet. In other situations, written documents, memorials and stuff in general intended for the Serbian people (public institutions, TV channels, local brands etc) use the Cyrillic, while everything else (restaurants, bars etc) use the Latin alphabet. Tourist attractions and roadsigns use both at the same time, so everyone can understand what is said.