Source : Free On-Line Dictionary of Computing

Pentium
     
         {Intel}'s {superscalar} successor to the {486}.
        It has two 32-bit 486-type integer {pipelines} with dependency
        checking.  It can execute a maximum of two instructions per
        cycle.  It does pipelined {floating-point} and performs
        {branch prediction}.  It has 16 {kilobytes} of on-chip
        {cache}, a 64-bit memory interface, 8 32-bit general-purpose
        {registers} and 8 80-bit {floating-point} registers.  It is
        built from 3.1 million transistors on a 262.4 mm^2 die with
        ~2.3 million transistors in the core logic.  Its {clock rate}
        is 66MHz, heat dissipation is 16W, integer performance is 64.5
        {SPECint92}, {floating-point} performance 56.9 {SPECfp92}.
     
        It is called "Pentium" because it is the fifth in the 80x86
        line.  It would have been called the 80586 had a US court not
        ruled that you can't trademark a number.
     
        The successors are the {Pentium Pro} and {Pentium II}.
     
        A {floating-point division bug
        (ftp://ftp.isi.edu/pub/carlton/pentium/FAQ)} was discovered in
        October 1994.
     
        [Internal implementation, "Microprocessor Report" newsletter,
        1993-03-29, volume 7, number 4].
     
        [Pentium based computers, PC Magazine, 1994-01-25].
     
        (1997-11-21)