SCSI ports support higher transmission speeds than do traditional serial and parallel ports, and can allow you to attach up to seven devices to the same port. TV means a Television connection, allowing the notebook to be connected to a TV screen. Port replicators and dock stations are like power strips for a notebook where you plug in monitors, keyboards, printers, etc. You push one button to attach or detach the notebook, and all the devices stay connected to the replicator or station. Besides being convenient, this lets you neatly arrange your cabling, and helps avoid breaking a notebook connector.
Every notebook has several slots available to hold so-called PC cards.
Virtually all notebooks now have enough slots to hold two Type II cards or one Type III card. PC cards were originally designed to hold additional memory and some software. Type II PC cards now can be modems, Ethernet or other network-connection cards, game cards, software, and a host of other things. You'd need 700 floppies to back up an entire 1GB notebook. This is where ZIP drive comes handy.