Digital Signature Certificates (DSC) are the digital equivalent (that is electronic format) of physical or paper certificates.

An income tax is a tax imposed on individuals or entities in respect of the income or profits earned by them. Income tax generally is computed as the product of a tax rate times the taxable income.

Sport is a form of physical activity or game. Often competitive and organized, sports use, maintain, or improve physical ability and skills.

Computer services are activities that support the implementation, maintenance, operation, cleaning and enhancement of a computer system.

Software is a collection of programs and data that tell a computer how to perform specific tasks.