If you wrote the check, the only way to guarantee that you will not be liable for it longer than six months is to place a stop payment order on it. According to Bankrate.com, an oral stop-payment order expires after 14 days and a written stop-payment order expires in six months.
Mb-a unit of information equal to 1000 kilobits or 10^6 (1,000,000) bits. Mbit, megabit. computer memory unit-a unit for measuring computer memory. kb, kbit, kilobit-a unit of information equal to 1000 bits. Gbit, gigabit, Gb-a unit of information equal to 1000 megabits or 10^9 (1,000,000,000) bits.
Kilobytes (KB) Megabytes (MB) Kilobyte (KB) is a common measurement unit of digital information (including text, sound, graphic, video, and other sorts of information) that equals to 1000 bytes. In practical information technology, KB is actually equal to 210 bytes, which makes it equal to 1024 bytes.