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.

The megabit (Mbit) equals 1,000 kilobits or one million bits, most commonly seen in internet speed ratings where ISPs advertise plans in megabits per second (Mbps). It is important to distinguish megabits from megabytes, since a 100 Mbps connection delivers roughly 12.5 megabytes per second of actual download speed. This unit is essential for comparing and understanding network performance.