8051 and 8951

is there any difference between 8051 and 8951.if so can you mention please....

Hey Sajujohn, you might have found answer,
if not then please read this:

Similarity:
Pinout
Instruction set
Internal memory structure (RAM)

Difference:
8951 has flash memory
8951 has ISP

Guys, correct me if I am wrong.

To add to what to rushi has said, 8951's were first developed in the 90's as an improvement the 8051. They are faster and more complex then the 8051, many have 2, 4 or 6 clock cores as opposed to 12. Whats more many provide extras such as DAC's, ADC's, I2C, USB, CAN etc