1. Распределите слова по четырем группам: сущ., глаг., наречие, прилагат.:
Communication, to transfer, information, quickly, conveniently, source, automatic, stations, to stand out, is, customers, frequency, telegraphy, to see, approximately, are, to cover, to use, to exchange, half, rotary, international.

2. Распределите слова в однокоренные группы:
information, communication, international, exchange, frequency, automatic, telegraphy, rotary,
equipped, switching, customers, users, wiring, subscribe, communicate, informate, national, frequent, change, telegraph, automatical, rotate, equipment, use, switch, wire, prescribe, custom.