A subsection of a company’s overall area of operation that oversees an established separate product line
A Business Segment (or a Strategic Business Unit) is a subsection of a company’s overall operations in which there is an established, separate product line. A business segment can be identified by the product(s) sold or services provided or by geographical locations that the company operates in.

Senior management typically divides the overall company into business segments to understand which areas of the company need improvement and which areas are doing well.
Walmart Inc (WMT) is an American multinational retail corporation incorporated on October 31, 1969, that operates through the following business segments:
(Source: Walmart Corporate Investor Relations Website)
Amazon.com Inc (AMZN) is a global technology leader in the provision of online retail products and cloud computing. The company was founded in July 1994 by Jeffrey P. Bezos and is headquartered in Seattle, Washington. The company operates through the following business segments:
(Source: Amazon Corporate Website)
Apple Inc (AAPL) is an American multinational technology company that designs, develops, and sells mobile communication and media devices, personal computers, computer software, and online services. The company was founded on April 1, 1976, and is currently headquartered in Cupertino, California. The company operates its business segments on a geographical basis:
Each segment provides similar hardware products and software products, and similar services.
(Source: Apple Corporate Website)
Starbucks Corporation (SBUX) was incorporated on November 4, 1985, and is a roaster, marketer, and retailer of coffee. The company is headquartered in Seattle, Washington, and operates through the following segments:
Starbucks also operates several non-reportable segments such as Teavana retail stores, Seattle’s Best Coffee, and other developing businesses.
(Source: Starbucks Corporate Website)
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