in the 1980s and 1990s, a variety of svr4 versions of unix were available commercially for the x86 pc platform. however, the market for commercial unix on pcs declined after linux and bsd became widely available. in late 1994, eric s. raymond discontinued his "pc-clone unix software buyer's guide" on usenet, stating, "the reason i am dropping this is that i run linux now, and i no longer find the svr4 market interesting or significant."