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A quick look inside of some of the subjects covered: Downlink - Uplink, High Speed Packet Access - High Speed Downlink Packet Access (HSDPA), Telecommunications link - Downlink, Multi-carrier code division multiple access - Downlink: MC-CDM, Downlink - Private and public - accessibility and ownership, Downlink - Multipoint, Downlink - Point-to-point, Multi-carrier spread spectrum - Downlink: MC-CDM, Downlink - Reverse link, ACARS - Flight data acquisition and management system message downlink, High-Speed Downlink Packet Access - Hybrid automatic repeat-request (HARQ), High-Speed Downlink Packet Access - Roadmap, Downlink - Forward link, Link (telecommunications) - Downlink, High-Speed Downlink Packet Access - Adoption, Dual-Cell HSDPA - High-Speed Downlink Shared Channel, Downlink - Point-to-multipoint, High-Speed Downlink Packet Access - Fast packet scheduling, Downlink - Broadcast, High-Speed Packet Access - High Speed Downlink Packet Access (HSDPA), High-Speed Downlink Packet Access - Other improvements, ACARS - Departure delay downlink, Evolved EDGE - Downlink Dual Carrier, E-UTRA - Downlink (DL), and much more...