yttrium (Y)

A rare trivalent, silvery, metallic chemical element used in various alloys and to make the

red color phosphors in cathode ray tubes (CRTs).Yttrium also is used in YAG/LED (Yttrium Aluminum Garnet/Light-Emitting Diode) light sources. Number 39 in the Periodic Table of Elements, yttrium is named for the village of Ytterby, Sweden, where it was discovered. So were erbium, ytterbium, and terbium.

See also erbium, LED, television, YAG/LED, and Ytterby.

• original equipment manufacturer (OEM)
• or ITU-TSS)
• orthogonal
• orthogonal frequency division multiplexing (OFDM)
• oscillate
• oscillate
• oscillator
• oscillator
• OSI Reference Model (Open Systems Interconnection Model)
• OS (Operating System)
• OSPF (Open Shortest Path First)
• OSP (OutSide Plant)
• OSS (Operations Support System)
• Ostrofsky, Marc
• OTA (over the air)
• Other Common Carrier (OCC)
• OTN (Optical Transport Network)
• OTN (Optical Transport Network)
• OTU (Optical Transport Unit)
• OTU (Optical Transport Unit)
• out-of-band signaling and control
• out-of-phase
• outside plant (OSP)
• outside vapor deposition (OVD)
• outsourcing