another way to remember it:

Code:
Imports System.Numerics

Public Class Form1

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim kb As New BigInteger(2 ^ 10) 'kb
        Dim Mb As New BigInteger(2 ^ 20) 'Mb
        Dim Gb As New BigInteger(2 ^ 30) 'Gb
        Dim Tb As New BigInteger(2 ^ 40) 'Tb
        Dim Pb As New BigInteger(2 ^ 50) 'Petabyte
        Dim Eb As New BigInteger(2 ^ 60) 'Exabyte
        Dim Zb As New BigInteger(2 ^ 70) 'Zettabyte
        Dim Yb As New BigInteger(2 ^ 80) 'Yottabyte
        Stop
    End Sub
End Class