ELECTRIC DEVICE FOR THE MEASUREMENTS OF [ HEAT CONSUMPTION AND] WATER CONSUMPTION AND [ ACCESSORIES THEREFORE, NAMELY, IMPULSE CONTACT COUNTER, SERVICE HOUR COUNTER, INDICATOR CONTACTS; NAMELY, DIRECT READOUT BY MEANS OF BUILT-IN DISPLAY AND FOIL KEYBOARD, DATA READOUT VIA AN OPTICAL INTERFACE ON PC OR LAPTOP, DIRECT READOUT ON A PERMANENTLY CONNECTED PC, TELEPHONE MODEMS AND EXTERNAL PC MASTER TERMINALS FOR USE IN REMOTE DATA TRANSMISSION; COMPUTER; COMPUTER SOFTWARE FOR MANAGING A CONTROL R...