The definition information for symptom substitution is provided by Stedman's. You can search our medical dictionary here. Stedman's, part of Lippincott Williams & Wilkins, provides a comprehensive line of health-science publications for healthcare professionals and medical students.
Gigabyte: A Gigabyte is approximately 1,000 Megabytes. A Gigabyte is still a very common term used these days when referring to disk space or drive storage. 1 Gigabyte of data is almost twice the amount of data that a CD-ROM can hold. But it's about one thousand times the capacity of a 3-1/2 floppy disk. 1 Gigabyte could hold the contents of about 10 yards of books on a shelf. 100 Gigabytes could hold the entire library floor of academic journals.
A Byte is equal to 8 Bits. A Kilobyte is actually 1,024 Bytes depending on which definition is used. A Megabyte is approximately 1000 Kilobytes. A megabyte is a unit of information or computer storage equal to 1,048,576 bytes (Difference between kilobyte, megabyte and gigabyte). A Gigabyte is approximately 1000 Megabytes. A gigabyte is a unit of information or computer storage meaning approximately 1.07 billion bytes.