Abstract: A control language using conventional text characters and a unique command and instruction delimiter whereby the commands and instructions which use conventional text characters may be detected and presented to a utilization device is shown. The control language facilitates the transmission of commands and instructions through existing data communication networks without alterations thereto. In addition, a structure suitable for scanning coded signals, detecting the unique delimiter and providing an indicia of commands and instructions is shown.

Abstract: Disclosed is a system and method for interleaved printing of letters and envelopes in an unattended manner. The system includes a memory for storing in a first portion thereof, text codes and control codes corresponding to the constant text of a form letter and envelope to be printed. As required, one or more blocks of variable data are written into the memory succeeding the form letter and envelope. The system is operative to output the contents of the memory to a printer while merging the variable data with the form letter and the envelope for a completed letter followed by the envelope. Logic is provided to utilize a selected field of a record of variable data exclusively in either the letter or envelope. The printing system is also operative to print more than one copy of the same letter before printing the envelope. All of the printing relative to the record is performed, however, before the next record is read so that distribution of the letter to all recipients can begin when the next record is read.

Abstract: An apparatus for performing multiple operations during a memory revolution in an electronic dynamic shift register. The memory is initially arranged by the input of control codes such as record, operation, separator, and hold flags. The separator flag defines a normal section and an alternate section, and the operation and hold flags define the position of the next character to be addressed in each of the sections. The record flag is the operating point for an output operation in the normal section. When one of the sections is addressed and it does not contain the operation flag, the hold and operation flags are exchanged in order that the operation flag is in the section addressed. With the operation flag in the normal section, an input zone is defined by the separator flag in the alternate section, and a revision zone is defined from the record flag to the separator flag in the normal section.

Abstract: A system for merging data flow having a typewriter electronically connected to a buffer, which is a dynamic electronic shift register, for inputting data into sections of the buffer and for merging the data in the sections into a single printout. System control logic is provided to allow (1) a separator, or partition, code to be input into the buffer for defining sections (2) codes corresponding to hold and operation flags to be input into the sections, and (3) text data codes corresponding to characters and switching and/or stopping points to be input into the sections. In addition, the system control logic is operable to allow the operator to insert characters into and delete characters from the sections of the buffer for text editing and revision.