Abstract: There are sequencers and format registers which create variable length digital data signal fields and associated field attributes, both with the fields and operations performed on the fields in a random access memory with a central processing unit having comprehensive processing capability, including arithmetic, field and record looping, compare, move and jump, look-up and disk read/write functions, I/O keyboard, display, print types of processing. The sequencers and associated format registers allow and manage comprehensive association of attributes with variable length digital data signal fields.