Abstract: A computer program and a method for operating it to convert spreadsheet models into callable, compiled routines. The models are first converted into program code in a language such as C. Then the program code is compiled into computer object code.

Abstract: A computer program and a method for operating it to convert spreadsheet models into callable, compiled routines. The models are first converted into program code in a language such as C. Then the program code is compiled into computer object code.

Abstract: Each terminal in a full-duplex communication system comprises a computer-controlled display screen such as a CRT, at least one input device such as a keyboard, a mouse or a light pen and bidirectional communication system through which the terminals are interconnected. Each communication comprises a receiver for receiving display information received at the terminal from the remote terminal(s) and a transmitter for transmitting information to the remote terminal(s) where it is displayed. The invention enables multiple terminal users to simultaneously generate or modify a single common document in such a way that any changes to the document made by one user are instantaneously reflected at the terminals of all other users. To implement the present invention, each terminal comprises control processor which periodically reads its input means and communications system and uses the information contained therein to control the content of a local copy of the common document stored in its memory.

Abstract: Each terminal in a full-duplex communication system comprises a computer-controlled display screen such as a CRT, at least one input means such as a keyboard, a mouse or a light pen and bidirectional communication means through which the terminals are interconnected. Each communication means comprises a receiver for receiving display information received at the terminal from the remote terminal(s) and a transmitter for transmitting information to the remote terminal(s) where it is displayed. In accordance with the invention, each terminal also comprises control means which periodically read sits input means and communications means and uses the information contained therein to control the content of its display. Further, the control means at each terminal also provides to its transmitter instructions which are transmitted to the remote terminal to change the display at the remote terminal so that all the displays are the same.