Floating Point
There were several floating-point types, including single (the 4-byte representation) double (the 8-byte IEEE 754 representation), extended (a 10-byte IEEE 754 representation used mostly internally by numeric coprocessors) and Real (a 6-byte representation).
In the early days, Real was the most popular. Many PCs did not have a floating point coprocessor so all FP had to be done in software. Borland's own FP algorithms on Real were quicker than using the other types, though its library also emulated the other types in software.
Read more about this topic: Turbo Pascal
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