Around the 1940's and 1950's a musical genre had been created.The term "rock and roll" now has at least two different meanings, both in common managment: as identical with rock music and as music that originated in the mid-1950s and later developed "into the more surrounding...

In the late 1960's a musical genre had developed ,the genre was called Heavy Metal.Heavy Metal developed from rock music. The Instruments that are used in Heavy Metal are:Electric guitar, bass guitar, drums ,vocals ,keyboards.

Pop (a term that originally  from an abbreviation of "popular") is a music genre which originated in its modern form in the 1950s, deriving from rock 'n' roll. Pop includes many instruments such as:bass guitar,drums,keyboard and may many more.  

around the late 19th century a genre had formed, the genre was The Blues.The Instruments included in The Blues are:Guitar,BassGuitar,Piano,Harmonica,Double bass,Drums, Saxophone,Vocals,Trombone and last but sirtenly not least the Trumpet.

Jazz is a style of music that originated at the beginning of the 20th century,in black communities in the Southern United States.Jazz was created out of a mix of African and European music traditions. The Mainstream for Jazz was around the 1920's until the 1970's.Jazz is...