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What Calculator is:

• A tool for calculating mathematical equations
• Uses standard mathematical notation where possible (so users do not have to learn the application when they already know maths)
• Easy enough to use for simple maths (add, subtract, multiply, divide)
• Powerful enough for mid-level mathematics (though not at the expense of being easy for simple mathematics)
• Fast to load and responsive to input
• Appropriately sized to fit into standard screen resolutions (e.g. netbooks)
• Fully accessible
• Well documented
• Integrated into the GNOME Desktop

What Calculator is not:

• It does not emulate any existing calculator interfaces, hardware or software (use those calculators if you want this behaviour)
• It is not a power-tool for professional mathematicians (professionals should use a specialist application)
• It is not a programming language (programmers should use a programming language)