Calculators have evolved significantly since their inception, transforming from basic arithmetic devices into sophisticated tools that cater to a wide array of specialized tasks. They are now indispensable in various fields, from education and finance to health and engineering. The range of calculators available today includes basic calculators for simple addition and subtraction, scientific calculators for complex mathematical functions, financial calculators for budgeting and investment planning, and health calculators for monitoring fitness and nutrition. Each type of calculator is designed with specific features and functionalities to meet the unique needs of its users.

Basic calculators, often the first type of calculator encountered by students, handle elementary arithmetic operations such as addition, subtraction, multiplication, and division.