The kilobyte (KB) equals 1,024 bytes in binary computing terms and is used to measure small files like text documents, email messages, and thumbnail images. While the term sometimes refers to 1,000 bytes in networking contexts, operating systems consistently use the binary definition. One kilobyte can store roughly half a page of plain text.

The petabyte (PB) equals 1,024 terabytes or roughly 1.13 quadrillion bytes, representing storage volumes used by large tech companies, research institutions, and cloud platforms. Major streaming services, social media networks, and scientific datasets are measured in petabytes because of the sheer volume of user-generated content. One petabyte can store approximately 500 billion pages of standard text.