Your modem's speed is measured in the number of bits it can transfer in a second. Modems rated in kilobits per second are now the standard.
kernel
Modern operating systems are typically built in layers, with each layer adding new capabilities, such as disk access techniques or a graphical user interface. But the essential layer, the foundation on which the rest of the operating system rests, is typically called a kernel. In general, the kernel provides low-level services, such as memory management, basic hardware interaction, and security. Without the kernel, your system would stop.
kilobyte
Although kilo is Greek for a thousand, a kilobyte actually contains 1,024 bytes (that's 2 to the 10th power). In other words, a thousand bytes is actually less than a kilobyte. Remember that the next time you download a file. Abbreviated as K.
