Always under construction By Hugh Stegman nv6H

WWVL Old NBS low-frequency time stn, no longer on air

WWW World Wide Web, aka W3, www, Web, World Wide Wait

Wx Weather

WXP Weather Processor (Computer program)

WYFR We're Your Family Radio (Callsign)

WYSIWYG What You See Is What You Get (computers)

X (1) Reactance, in ohms

(2) (Also "Xray") prosign for end of sentence

XAML eXtensible Application Markup Language (mickeysoft)

X-band (1) 8-12 GHz microwave band

(2) Expanded AM band, 1610-1720 kHz

XCHS Extended Cylinder, Head, Sector (addressing)

xcvr Transceiver

XFCB Extra-Fast Complementary Bipolar

xfmr Transformer

XINU XINU Is Not UNIX (recursive and retrograde)

xistor Transistor

xmit Transmit mode

XML eXtensible Markup Language

xmlns XML namespace

XMODEM Async file transfer protocol, uses 128-byte or 1K packets, over direct

links, not Internet

XMPP Extensible Messaging and Presence Protocol

XMS Expanded Memory System (IBM PC, different spec from EMS)

xmsn Transmission

xmt Transmit mode

xmtr Transmitter

XO Executive officer

Xon/Xoff Computer serial flow control, usually using DC3/DC1 (^S/^Q)

XPIC Cross-Polar Interference Canceller

XPOL Cross-Polarization Level

XPND Expand

xponder Transponder

XSD XML Schema Definitions (see XML)

XSL eXtensible Style Language

XSS (1) Cross Site Scripting (Computer security)

(2) eXperimental Satellite System (USAF)

(3) eXtremely Simple Syndication (news feed)

(4) ALE Callsign for new UK/NATO ALE system [~]

XT eXTra value (PC-XT was first IBM PC with a hard disk; obsolete)

XTACACS Extended Terminal Access Controller Access Control System (Cisco)

xtal Crystal

XTP eXpress Transfer Protocol (computers)

XUL (1) XML User-interface Language

(2) eXtensible User-interface Language

X-windows Standard windowing system for networks (usually Unix) [~]

XXX (1) CW prefix: traffic is urgent (same as SECURITE) [~]

(2) Set of standards for X.25 PAD packet networking

XYL Wife ("ex-young lady")

Y2K Year 2000, or resulting computer bugs (geekspeak)

YAHOO Yet Another Heirarchical Officious Oracle; may be a back-formation, as guys who started Yahoo! styled themselves as yahoos

YB Yacht Boy (Grundig radio line)

YBCO Yttrium Barium Copper Oxide

YF CW brevity code: "Wife," more typically "XYL" (eX-Young Lady)

YIG Yttrium Iron Garnet

YL Female voice ("Young Lady")

YLE Yleisradio (Finland, not an acronym)

YMMV Your Mileage May Vary (cardinal rule of HF)

YMODEM Along with YMODEM-G, improved async file transfer protocol [~]

YTO YIG-Tuned Oscillator

Z (1) Zulu time, standard time on 0 meridian, like UT

(2) Impedance (in ohms)

(3) This message has FLASH precedence

(4) Zoll (German Customs)

Z-80 Early 8-bit processor chip, used by CP/M, still made

ZAA Z-code: You have improper circuit discipline

ZAE Z-code: I am unable to receive you

ZAN Z-code: We have absolutely negative copy

ZB Zollboot (German Customs patrol boat)

ZBI UK Military Z-code: Switch to voice mode

ZBO Z-code: (INT ZBO Do you have traffic (of precedence...) for me?)

I have traffic (of precedence...) for you

ZBR Z-code: Break for retuning

ZBZ Z-code: (INT ZBZ: What is my signal's printing acceptability? (1-5)

Your signal's printing acceptability is (1-5)

Z-Count 29-bit binary GPS time stamp (17 LSBs are broadcast)

ZCP Z-code: I have poor conditions; please use full power

ZCPR3 Small Z-80 operating system, improved on CP/M, obsolete

ZDE Z-code: Message undelivered

ZDF Z-code: Message delivered

ZEN Military Z-code: Message has been copied to...

ZFD Military Z-code: Message may be a duplicate

ZFG Military Z-code: Message is a duplicate and is to be forwarded

ZKI Z-code: Listen [on _ kHz]

ZKR Z-code: I have a radio watch on _ kHz

ZLST Zoll

ZNC Z-code: I have no communication with _

ZNG Z-code: Band conditions no good for copy

ZNI Z-code: No station ID heard

ZNJ Military Z-code: Message has been sent to...

ZNK Military Z-code: Addressees who do not hold cryptographic facilities

are exempted

ZNR Military Z-code: Msg may be forwarded without change by radio or

non-approved circuit

ZNR UUUUU Security Warning Signal: Message is Unclassified or offline encrypted -

OK to forward unchanged on any circuit

ZNX You have disclosed an EEFI (1-10; see EEFI)

ZNY Military Z-code: Do not forward this message unencrypted by radio or

non-approved circuit.

ZNY CCCCC Security Warning Signal: Message is CONFIDENTIAL

ZNY RRRRR Security Warning Signal: Message is RESTRICTED

ZNY SSSSS Security Warning Signal: Message is SECRET

ZNY TTTTT Security Warning Signal: Message is TOP SECRET

ZRF Zero Retention Force

ZRO Z-code: How copy?

ZSR Z-code: You are strong-readable

ZUC Z-code: Unable to comply until ----

ZUH Z-code: Unable to comply

ZUT (1) Unofficial Z-code: "CW Forever!" (see CW)

(2) Zeta Upsilon Tau, 60s US Coast Guard radio op society

ZWEI ZWEI Was EINE Initially (recursive acronym; see EINE)

ZWR Z-code: You are weak-readable

° degrees

µ micro

µµF micro-microfarad, now pF

µH microhenry

µV microvolt

Police/CB 10-codes:

10-1 Your signals are being received poorly

10-2 Your signals are loud & clear

10-3 Stop transmitting

10-4 Your message is received ("Roger;" saying both is redundant)

10-5 Please relay

10-6 Station is busy

10-7 Out of service, radio off

10-8 In service, available

10-9 Please repeat message

10-10 Out of service, radio on

10-19 Go back to station/HQ

10-20 Location ("What's your 20?")

10-21 Use landline/phone

10-22 Cancel message

10-23 Stand by

10-27 Driver's license ID check

10-28 Vehicle registration check ("Rolling 28" -CHP)

10-29 Wants & warrants check

10-33 All units stand by, frequency is on emergency status

10-37 Time check

10-97 I am arriving at assignment/ on scene ("I'm 97")

10-98 Assignment completed/ leaving scene

10-99 Emergency; equivalent to SOS and MAYDAY

CHP 11-codes:

11-10 Take a report

11-24 Disabled vehicle

11-25 Traffic hazard

11-26 Disabled vehicle, occupied

11-27 Drivers license check

11-41 Ambulance requested

11-44 Possible fatality

11-48 Provide transportation

11-66 Defective traffic signals

11-79 Accident, ambulance rolling

11-80 Accident, major injuries

11-81 Accident, minor injuries

11-82 Accident, property damage

11-83 Accident, no details

11-84 Direct traffic

11-85 Tow truck requested

11-86 Bomb threat

11-87 Bomb found

11-98 Meet up

11-99 Emergency; equivalent to SOS and MAYDAY

Other police codes:
Code 1 Come in on the radio

Code 2 Respond quickly, without lights/siren ("hurry")

Code 2A Hurry faster - call is priority

Code 3 Respond with lights/siren

Code 4 No more help needed, situation stable

Code 4A No more help needed, suspect still not in custody

Code 5 Stakeout at (--), uniformed patrol stay away

Code 6 Out of vehicle, on investigation

Code 7 Out to lunch

Code 10 Request clear frequency

Code 20 Notify news media

Code 30 Alarm

Code 30A Alarm with audible suspects inside

Code 33 Emergency, all units stand by

Code 37 Vehicle is stolen (LAPD)

Code Alpha Assemble at prearranged staging point (LAPD)

Code Blue (1) Notify police

(2) Respiratory emergency (medical)

Code Red (1) Notify fire department

(2) Frequency is restricted (LAPD Metro)

(your cops might be a bit different)

Computer networking standards:

IEEE 1394 "Firewire" high speed data transfer

56Kflex Telephone modem 56K, falling back in 2K increments from there.

802 Family of IEEE recommendations for computer networks

802.3 Ethernet, fast packet transfers, resembles wired radio

802.3ab Gigabit Ethernet, one billion bits/sec over long copper

802.3u Provides auto-speed, autoselection of duplex

802.3z Gigabit Ethernet, one billion bits/sec over fiber or twinax

802.11 Wireless LAN; 1-2 Mbps using spread spectrum 2.4 GHz

802.11a 54 Mbps via 5-GHz orthogonal FDM

802.11b 11 Mbps on 2.4 GHz (Wi-Fi)

802.11g 20+ Mbps in 2.4 GHz SS

802.11n Multi-channel on both bands

802.12 Recommendation for 100BaseVG/ 100VG/ AnyLAN

10Base-2 IEEE 802.3 thin ethernet (high-speed computer networking)

10Base-5 IEEE 802.3 thick ethernet

10Base-F IEEE 802.3 ethernet over fibre-optic cable

10Base-T IEEE 802.3 ethernet over twisted pair cabling

1000Base Gigabit ethernet standards

1000Base-CX Short-haul over copper

1000Base-LX 1300nm multimode and single-mode fiber according to 802.3z

1000Base-SX 850nm multimode fiber according to 802.3z

1000Base-T Long-haul over copper according to 802.3ab

100Base-T IEEE 802.3 fast Ethernet at 100Mbit/s

100Base-T4 Encoded 100Mbit/s over 4 pairs, obsolescent

100Base-TX encoded 100Mbit/s over 2 pairs

100Base-VG see 100VG-AnyLAN

100Base-X Encoded 100Mbit/s

100VG-AnyLAN 100Mb/s LAN carrying Ethernet or Token-Ring, obsolescent

ATM Asynchronous Transfer Mode

AAL ATM Adaptation Layer

AAL-1 Synchronous adaptation layer designed for carrying voice trunk lines

AAL-2 Adaptation layer intended for variable bit rate video, but never really got

off the ground and is not offered by vendors

AAL-3/4 Adaptation layer intended to be used by Frame Relay and SMDS and

other delay-insensitive variable rate or bursty data traffic, but mostly

now passed over in favour of AAL-5

AAL-5 'Simple and efficient adaptation layer' for computer networking

Bell 103 300 bps FSK (US modem tones, see V.21)

Bell 212A 1200 bps (US modem tones, see V.22)

T1 Relatively high speed data connection over phone line

V.nn Prefix for CCITT specs - these are for phone modems

V.17 Fax modem spec, to 14400 bps

V.21 aka "Bell 103," the old 300 bps modem spec, makes sound like RTTY

V.22 aka "Bell 212A," 1200 bps modem spec, slight differences

V.22bis Above spec extended to 2400 bps

V.23 1200/75 bps modem spec

V.24 data link spec - equiv RS232

V.25bis modem control sequence for international calls, lost out to Hayes

V.26bis 2400bps half duplex synchronous, used for fax

V.27ter 4800bps half duplex synchronous, used for fax

V.28 Data link spec

V.32 9600/4800bps

V.32bis 14.4K/12K/9600/7200/4800bps

V.32 terbo (V.32 bis ter) proprietary modem spec for 19,200

V.34 33.6K/31.2K/28.8K/26.4K/24K/19.2K/16.8K/14.4Kbps, then like V.32

V.42 LAPM error control, 1200bps and above

V.42bis Data compression, 1200bps and above

V.90 56Kb, falls back like 56Kflex

V.FC V.Fast Class: unofficial, 19.2Kbps

X.nn ITU-T (formerly CCITT) recommendations:

X.PC Async version of X.25 for small computers

X.10 Proprietary device control by signalling over AC lines

X.21 balanced data signalling standard, 15 wires

X.21bis Above, for 25 wires, unbalanced

X.25 Packet communication protocols (AX.25 is amateur radio)

X.27 37-pin data interface, adding handshake and flow control

X.28 Standard interface, terminal to PAD

X.29 Control packet standard for PAD and remote host, using X.25

X.3 PAD standard

X.31 Network security protocol

X.400 E-mail protocol

X.413 Definition of message storage and forwarding

X.419 Defines P3 and P7 protocols

X.420 Defines interpersonal e-mail

X.435 Defines control messages

X.441 Defines voice messages

X.500 Directory standard

X.509 Digital security and identification

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