Most of the books and papers mentioning AC Voltage waveform whether, this is proper method to use? other term DC Current and Voltage (Direct Current Current and Voltage).
The correct term is "alternating current", not "alternative current". With AC you can run three phase motors with high load and high efficiencies, and very simple circuitry for start and stop. A one-phase AC motor generally has much less efficiency. DC, on the other hand, may be used for more sophisticated circuits including fast "switched-mode" converters, motor controllers with variable speeds, all kinds of processor based equipment.