Words starting with 1

Abbreviation of thousandth.

IEEE physical layer network specification for 100 Mbps over two pairs of Category 5 UTP or STP wire.

Abbreviation of hundredth.

IEEE 802.3 Ethernet LAN specification, using unshielded twisted pair wiring running at 10Mbps.

Which comes after the ninth.

Having no predecessor. The ordinal number corresponding to one.