Jam bands are musical groups whose albums and live performances relate to a fan culture that originated with the 1960s groups such as the Grateful Dead and The Allman Brothers Band. This jam band environment continued in the 1990s with bands like Phish. The performances of these bands often feature extended musical improvisation ("jams") over rhythmic grooves and chord patterns and long sets of music that cross genre boundaries.

While the seminal group Grateful Dead were originally categorized as psychedelic rock, by the 1990s the term "jam band" was used for groups playing a variety of genres, including those outside of rock such as funk, progressive bluegrass, and jazz fusion. The term is also used for some groups playing blues, country music, folk music, world music, and electronic music.

In the 1980s the Grateful Dead's fan base included a large core group which followed their tours from show to show. From following the Dead, fans developed a sense of community and loyalty. In the 1990s bands such as Phish began to attract this fan base. The term "jam band" was first used regarding Grateful Dead and Phish culture in the 1990s.

Fruit preserves are preparations of fruits, vegetables and sugar, often canned or sealed for long-term storage. The preparation of fruit preserves today often involves adding commercial or natural pectin as a gelling agent, although sugar or honey may be used, as well. Before World War II, fruit preserve recipes did not include pectin, and many artisan jams today are made without pectin. The ingredients used and how they are prepared determine the type of preserves; jams, jellies and marmalades are all examples of different styles of fruit preserves that vary based upon the ingredients used.

Many varieties of fruit preserves are made globally, including sweet fruit preserves, such as strawberry, as well as savoury preserves of culinary vegetables, such as tomatoes or squash. In North America, the plural form "preserves" is used to describe all types of jams and jellies. In British and Commonwealth English most fruit preserves are simply called jam, with the singular preserve being applied to high fruit content jam, often for marketing purposes. Additionally, the name of the type of fruit preserves will also vary depending on the regional variant of English being used.

Band may refer to: