In the early days of rock and roll , many tunes originally recorded by R&B and country musicians were still being re-recorded in a more popular vein by other artists with a more toned-down style or professional polish.  This was inevitable because radio stations were reluctant to play formats outside their target audience's taste. By far the most popular style of music in the mid-1950s / mid-1960s was still the professional light orchestra, therefore popular recording artists sought that format.  For many purists these popular versions lacked the raw, often amateurish, earthiness of the original introducing artists.
There is one · special · · atomic · datatype ( anyAtomicType ), and a number of · primitive · · atomic · datatypes which have anyAtomicType as their · base type · . All other · atomic · datatypes are · derived · either from one of the · primitive · · atomic · datatypes or from another · ordinary · · atomic · datatype. No · user-defined · datatype may have anyAtomicType as its · base type · .