The terms alternative rock and alternative music were coined in the 1980s to describe punk rock-inspired music genres which didn't fit into the mainstream genres of the time. At times it was used as catch-all phrase for rock music from underground artists in the 1980s and rock music in general in the 1990s and 2000s. More specifically, it is made up mostly of genres that appeared in the 1980s and became popular or well known by the 1990s, such as indie rock, grunge, gothic rock, and college rock. Most alternative bands were unified by their collective debt to punk, which laid the groundwork for underground and alternative music in the 1970s. Though the genre is considered to be rock, some of its genres were influenced by folk music, reggae, techno and jazz music among other genres.