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From Wiki-FL

SCSI - See small computer system interface.
small computer system interface (SCSI) [pronounced "scuzzy"] - A type of interface between computers and peripherals that allows faster communication than most other interface standards, often used to connect PCs to external disk drives.
sdsl - Symmetric Digital Subscriber Line - This technology provides the same bandwidth in both directions, upstream and downstream. That means whether you're uploading or downloading information, you have the same high-quality performance. SDSL provides transmission speeds within a T1/E1 range, of up to 1.5 Mbps at a maximum range of 12,000 - 18,000 feet from a central office, over a single-pair copper wire. This option is ideal for small and medium sized businesses that have an equal need to download and upload data over the Internet.