A MB takes up more memory than a KB. A KB, or kilobyte, takes up 1,000 bytes of memory, whereas a MB, or megabyte, takes up 1,000,000 bytes of memory.
Computer memory is measured using a binary system of ones and zeros. Each one or zero in memory is a bit. It takes eight bits to create a byte, the smallest processing unit. Once a megabyte is surpassed, the next unit of measure is a gigabyte, which equals 1,000,000,000 bytes.
Although represented with ones and zeros, computers operate by turning electrical components either on or off. These symbolic representations allow the user to interface with the computer.