Abstinence from meat and vegetarianism is a worldwide popular system of feeding that exclude taking meat products or limiting their consumption as well as animal based products. The origins of vegetarianism are in the ancient times.
Vegans are a kind of orthodox vegetarians who refuse to eat any kind of meat, fish, sea food, eggs, milk and products based on milk and sometimes even honey.
Lactovegetarians are people who do not avoid some milk products,
Ovo-lacto vegetarians are those who concede eating not only milk products but also eggs of some domestic birds.
All the types of vegetarianism allow thermal processing of food and this is one of the main feature that distinguishes it from raw eating.