42 DEVELOPMENT, UPDATING AND DESIGN OF SYSTEMS AND COMPUTER PROGRAMS RELATED TO THE PROCESS OF ENERGY, METERING AND POWER COMMUNICATION; DEVELOPMENT, UPDATING AND DESIGN OF COMPUTER PROGRAMS AND SYSTEMS RELATED TO THE PROCESS OF BILLING CUSTOMERS; DEVELOPMENT, DESIGN AND MAINTENANCE OF WEB SITES; RENTAL OF COMPUTER APPLICATIONS, DATABASES AND HARDWARE MAINLY IN THE FIELD OF BILLING AND MEETING