pseudo random binary sequence : A form of generating an M-file in the new Frequency Domain System Identification Toolbox, for a specified set of lengths (2^2-1 to 2^30-1) is called pseudo random binary sequence. It is also known as mlbs (for Maximum Length Binary Sequence).
numeric precision : Numeric quantities which are represented as double precision floating point numbers is called numeric precision. On most computers, such numbers have 53 significant binary bits, which is about 15 or 16 decimal digits.