A "big company" typically refers to a large corporation that operates on a national or international scale. These companies often have thousands of employees and generate significant revenue. They can be involved in various industries, such as technology, finance, or manufacturing, and may have multiple divisions or subsidiaries. Big companies often have a substantial impact on the economy and can influence market trends. They may also engage in corporate social responsibility initiatives, contributing to community development and sustainability efforts. Examples of big companies include Apple, Amazon, and Microsoft.