Mathematical operations are a part and parcel of our lives. Therefore calculators are there at our vicinity for major and lengthy calculations. Calculator forms an integral accessory of every professional locale. In business and the corporate world, calculations happening are in numerous units and there a calculator forms a necessity. This allied office product is available in a variety of designs, colours, styles and functionality. Digital calculator, solar calculator, electric calculator, battery operated calculator, scientific calculator; time zone calculator and statistical calculator are varied varieties of calculators. Certain calculating devices are not only useful for numeric calculations but also serve as an alarm clock, world clock, feeding and saving alphabetic and numeric data, calendar and more. A calculator makes work easy and quick. Therefore, this automation product has versatile uses, for domestic as well as commercial purposes. Since it has commercial purposes on a large scale, these are used as promotional tool and unique corporate gift by labeling them with a corporate logo and name.