Section 821-01: General concepts and terms | |
| 821-01-01 | | railway signalling | |
| 821-01-02 | | security apparatus, <for railways> | |
| 821-01-03 | | signalling system, <for railways> | |
| 821-01-04 | | lineside signalling | |
| 821-01-05 | | automatic signalling | |
| 821-01-06 | | continuous signalling | |
| 821-01-07 | | intermittent signalling | |
| 821-01-08 | | route signalling | |
| 821-01-09 | | speed signalling | |
| 821-01-10 | | fail-safe, adj | |
| 821-01-11 | | safety installation | |
| 821-01-12 | | section regulator | |
| 821-01-13 | | regulation | |
| 821-01-14 | | signal regulations | |
| 821-01-15 | | main running line | |
| 821-01-16 | | siding | |
| 821-01-17 | | operation, <of points, of a device> | |
| 821-01-18 | | ground frame operation | |
| 821-01-19 | | permission | |
| 821-01-20 | | authority for shunting | |
| 821-01-21 | | overlap, <in signalling> | |
| 821-01-22 | | route, <in signalling> | |
| 821-01-23 | | fouling point | |
| 821-01-24 | | reversible working | |
| 821-01-25 | | temporary single-line working | |
| 821-01-26 | | flank protection | |
| 821-01-27 | | line subject to speed restriction | |
| 821-01-28 | | control, <in signalling> | |
| 821-01-29 | | central control of traffic | |
| 821-01-30 | | direct control, <in signalling> | |
| 821-01-31 | | remote control, <in signalling> | |
| 821-01-32 | | local control, <in signalling> | |
| 821-01-33 | | normal position | |
| 821-01-34 | | reverse position | |
| 821-01-35 | | resetting device | |
| 821-01-36 | | prohibition device | |
| 821-01-37 | | clearing of a track | |
| 821-01-38 | | effect of train | |
| 821-01-39 | | rigid transmission | |
| 821-01-40 | | wire transmission | |
| 821-01-41 | | broken-wire detector | |
| 821-01-42 | | checking circuit | |
| 821-01-43 | | checking equipment | |
| 821-01-44 | | checking of an apparatus | |
| 821-01-45 | | correspondence checking | |
| 821-01-46 | | positional checking | |
| 821-01-47 | | repeater, <in signalling> | |
| 821-01-48 | | electromechanical repeater | |
| 821-01-49 | | light repeater | |
| 821-01-50 | | command, <in signalling> | |
| 821-01-51 | | commercial speed | |
| 821-01-52 | | degraded modes, pl | |
| 821-01-53 | | environmental conditions, <for signalling equipment> pl | |
| 821-01-54 | | equipment housing | |
| 821-01-55 | | exclusive guideway | |
| 821-01-56 | | generic application | |
| 821-01-57 | | generic product | |
| 821-01-58 | | grade of automation | |
| 821-01-59 | | guideway clearance | |
| 821-01-60 | | interchangeability, <of system components> | |
| 821-01-61 | | interoperability of a transport network | |
| 821-01-62 | | mission of a train | |
| 821-01-63 | | movement authority | |
| 821-01-64 | | operations control centre | |
| 821-01-65 | | operations control HMI | |
| 821-01-66 | | operations staff | |
| 821-01-67 | | passenger transfer area | |
| 821-01-68 | | passenger transfer door | |
| 821-01-69 | | platform track | |
| 821-01-70 | | platform waiting area | |
| 821-01-71 | | safe places, pl | |
| 821-01-72 | | safety space | |
| 821-01-73 | | safety-related, adj | |
| 821-01-74 | | specific application | |
| 821-01-75 | | supervise, verb | |
| 821-01-76 | | transfer area | |
| 821-01-77 | | transport authority | |
| 821-01-78 | | zero speed status | |
| 821-01-79 | | zone of protection | |
Section 821-02: Signals | |
| 821-02-01 | | signal, <in railway signalling> | |
| 821-02-02 | | aspect of a signal | |
| 821-02-03 | | indication of a signal | |
| 821-02-04 | | classification of signal aspects | |
| 821-02-05 | | signal on | |
| 821-02-06 | | open position, <of a signal> | |
| 821-02-07 | | signal at danger | |
| 821-02-08 | | clear signal | |
| 821-02-09 | | out-of-commission signal | |
| 821-02-10 | | masked signal | |
| 821-02-11 | | signal out | |
| 821-02-12 | | caution aspect | |
| 821-02-13 | | manual signalling | |
| 821-02-14 | | manually-operated signal | |
| 821-02-15 | | mechanical signalling | |
| 821-02-16 | | mechanical signal | |
| 821-02-17 | | semaphore signal | |
| 821-02-18 | | semaphore arm | |
| 821-02-19 | | violet square signal | |
| 821-02-20 | | disc signal | |
| 821-02-21 | | signal circuit controller | |
| 821-02-22 | | coupled signals, pl | |
| 821-02-23 | | signal bracket | |
| 821-02-24 | | bracketed signal | |
| 821-02-25 | | signal gantry | |
| 821-02-26 | | bell-code signalling | |
| 821-02-27 | | detonator | |
| 821-02-28 | | detonator placer | |
| 821-02-29 | | electric signalling | |
| 821-02-30 | | automatic signal | |
| 821-02-31 | | semi-automatic signal | |
| 821-02-32 | | automatic signal replacement | |
| 821-02-33 | | light signalling | |
| 821-02-34 | | light signal, <for signalling> | |
| 821-02-35 | | multiple-aspect light signal | |
| 821-02-36 | | position light signal | |
| 821-02-37 | | marker light | |
| 821-02-38 | | light unit | |
| 821-02-39 | | single light unit | |
| 821-02-40 | | multi-unit light signal | |
| 821-02-41 | | signal light, <for signalling> | |
| 821-02-42 | | flashing light signal | |
| 821-02-43 | | phantom light | |
| 821-02-44 | | searchlight signal | |
| 821-02-45 | | hot strip | |
| 821-02-46 | | side light | |
| 821-02-47 | | signal lamp | |
| 821-02-48 | | back light, <of a signal> | |
| 821-02-49 | | approach lighting | |
| 821-02-50 | | positioning of signals | |
| 821-02-51 | | warning presignalling distance | |
| 821-02-52 | | sighting distance | |
| 821-02-53 | | distance between signals | |
| 821-02-54 | | signal headway | |
| 821-02-55 | | signal in rear | |
| 821-02-56 | | signal identification plate | |
| 821-02-57 | | signal type plate | |
| 821-02-58 | | signal background | |
| 821-02-59 | | signal hood | |
| 821-02-60 | | signal not in use sign | |
| 821-02-61 | | warning board | |
| 821-02-62 | | execution signal | |
| 821-02-63 | | warning signal, <for train driver> | |
| 821-02-64 | | speed restriction warning signal | |
| 821-02-65 | | speed restriction execution signal | |
| 821-02-66 | | speed warning board | |
| 821-02-67 | | speed limit execution board | |
| 821-02-68 | | speed limit termination indicator | |
| 821-02-69 | | line speed indicator | |
| 821-02-70 | | route indicator | |
| 821-02-71 | | distant route indicator | |
| 821-02-72 | | direction indicating board | |
| 821-02-73 | | fouling point indicator | |
| 821-02-74 | | tail lamp | |
| 821-02-75 | | reflectorized board | |
| 821-02-76 | | stop-board | |
| 821-02-77 | | vehicle on-line indicator | |
| 821-02-78 | | whistle board | |
| 821-02-79 | | stop signal, <for signalling> | |
| 821-02-80 | | main signal | |
| 821-02-81 | | entry signal | |
| 821-02-82 | | exit signal | |
| 821-02-83 | | departure signal | |
| 821-02-84 | | departure light signal | |
| 821-02-85 | | common signal | |
| 821-02-86 | | main signal with shunting aspect | |
| 821-02-87 | | special purpose subsidiary signal | |
| 821-02-88 | | subsidiary signal | |
| 821-02-89 | | supplementary signal indication | |
| 821-02-90 | | block signal, <for signalling> | |
| 821-02-91 | | permissive signal, <in a block system> | |
| 821-02-92 | | stop and proceed signal | |
| 821-02-93 | | call-on signal | |
| 821-02-94 | | permissive light | |
| 821-02-95 | | shunt signal | |
| 821-02-96 | | shot shunting signal | |
| 821-02-97 | | ground signal | |
| 821-02-98 | | limit of shunt indicator | |
| 821-02-99 | | humping signal | |
| 821-02-100 | | distant signal | |
| 821-02-101 | | outer distant signal | |
| 821-02-102 | | pre-distant signal | |
| 821-02-103 | | repeating signal | |
| 821-02-104 | | short route signal | |
| 821-02-105 | | speed regulating signal | |
| 821-02-106 | | signal for work-site | |
| 821-02-107 | | intermittent warning signal | |
| 821-02-108 | | junction signal | |
| 821-02-109 | | hand signal | |
| 821-02-110 | | points indication signal | |
| 821-02-111 | | brake test signal | |
| 821-02-112 | | protection signal | |
| 821-02-113 | | special protection signal | |
| 821-02-114 | | wrong road signal | |
| 821-02-115 | | driver's indication signal | |
| 821-02-116 | | end of catenary signal | |
| 821-02-117 | | lower pantograph advance warning sign | |
| 821-02-118 | | lower pantograph execution sign | |
| 821-02-119 | | lower pantograph cancellation sign | |
| 821-02-120 | | switch-off-power warning sign | |
| 821-02-121 | | switch-off-power execution signal | |
| 821-02-122 | | switch-on-power indicator board | |
| 821-02-123 | | signal fault | |
| 821-02-124 | | whistle | |
| 821-02-125 | | St. Andrew's cross | |
| 821-02-126 | | warning signal, <for staff on the track> | |
| 821-02-127 | | driving on sight | |
Section 821-03: Train detection | |
| 821-03-01 | | track circuit | |
| 821-03-02 | | centre-fed track circuit | |
| 821-03-03 | | double-rail track circuit | |
| 821-03-04 | | single-rail track circuit | |
| 821-03-05 | | jointless track circuit | |
| 821-03-06 | | superimposible track circuit | |
| 821-03-07 | | direct current track circuit | |
| 821-03-08 | | alternating current track circuit | |
| 821-03-09 | | capacitor fed alternating current track circuit | |
| 821-03-10 | | inductance fed alternating current track circuit | |
| 821-03-11 | | coded current track circuit | |
| 821-03-12 | | high-voltage pulsed track circuit | |
| 821-03-13 | | track relay | |
| 821-03-14 | | insulated rail | |
| 821-03-15 | | insulated section of track | |
| 821-03-16 | | insulated joint | |
| 821-03-17 | | insulating ferrule | |
| 821-03-18 | | insulating fishplate | |
| 821-03-19 | | end post | |
| 821-03-20 | | insulating side-plate | |
| 821-03-21 | | electric separation joint | |
| 821-03-22 | | rail joint bond | |
| 821-03-23 | | impedance bond | |
| 821-03-24 | | resonant impedance bond | |
| 821-03-25 | | track circuit compensating capacitors | |
| 821-03-26 | | cut section of track circuit | |
| 821-03-27 | | track circuit interrupter | |
| 821-03-28 | | train shunt | |
| 821-03-29 | | loss of shunt | |
| 821-03-30 | | drop shunt of a track | |
| 821-03-31 | | prevent shunt | |
| 821-03-32 | | shunt resistance | |
| 821-03-33 | | ballast resistance | |
| 821-03-34 | | treadle | |
| 821-03-35 | | magnetic treadle | |
| 821-03-36 | | electromechanical treadle | |
| 821-03-37 | | delayed action electromechanical treadle | |
| 821-03-38 | | electronic treadle | |
| 821-03-39 | | directional treadle | |
| 821-03-40 | | loop detection equipment | |
| 821-03-41 | | axle counter | |
| 821-03-42 | | counting point | |
| 821-03-43 | | end-of-train detector | |
| 821-03-44 | | line clear detection | |
| 821-03-45 | | track occupancy indicator | |
| 821-03-46 | | certificate of acceptance | |
| 821-03-47 | | compatibility case | |
| 821-03-48 | | factor of safety | |
| 821-03-49 | | gabarit | |
| 821-03-50 | | spot transmission | |
| 821-03-51 | | train detection | |
| 821-03-52 | | train integrity | |
| 821-03-53 | | wheel detector | |
Section 821-04: Operation and detection of points and other rail-mounted equipment | |
| 821-04-01 | | blade | |
| 821-04-02 | | points, pl | |
| 821-04-03 | | facing points | |
| 821-04-04 | | trailing points | |
| 821-04-05 | | arrival points | |
| 821-04-06 | | shunting points | |
| 821-04-07 | | trailable points | |
| 821-04-08 | | non-resetting trailable points | |
| 821-04-09 | | resetting trailable points | |
| 821-04-10 | | intermediate points position | |
| 821-04-11 | | trap points | |
| 821-04-12 | | selective protective points | |
| 821-04-13 | | catch points | |
| 821-04-14 | | derailling points | |
| 821-04-15 | | derailer | |
| 821-04-16 | | point lock | |
| 821-04-17 | | independent point lock | |
| 821-04-18 | | dependent point lock | |
| 821-04-19 | | slide-chair point lock and detector | |
| 821-04-20 | | clamp lock | |
| 821-04-21 | | securing bolt | |
| 821-04-22 | | point machine | |
| 821-04-23 | | point detector | |
| 821-04-24 | | electric point detector | |
Section 821-05: Interlocking and signal box equipment | |
| 821-05-01 | | signal box | |
| 821-05-02 | | interlocking, <in railway signalling> | |
| 821-05-03 | | central signal box | |
| 821-05-04 | | centralized traffic control | |
| 821-05-05 | | satellite interlocking | |
| 821-05-06 | | track circuit diagram | |
| 821-05-07 | | control panel | |
| 821-05-08 | | indication panel | |
| 821-05-09 | | locking table | |
| 821-05-10 | | entrance-exit control | |
| 821-05-11 | | geographical control panel | |
| 821-05-12 | | individual switch operation | |
| 821-05-13 | | individual points control | |
| 821-05-14 | | group button | |
| 821-05-15 | | signalman | |
| 821-05-16 | | traffic controller | |
| 821-05-17 | | main route | |
| 821-05-18 | | shunt route | |
| 821-05-19 | | route setting system | |
| 821-05-20 | | route section | |
| 821-05-21 | | composite route | |
| 821-05-22 | | partial route | |
| 821-05-23 | | conflicting routes, pl | |
| 821-05-24 | | emergency route | |
| 821-05-25 | | route locking | |
| 821-05-26 | | complete route locking | |
| 821-05-27 | | sectional route releasing | |
| 821-05-28 | | manual cancellation of route | |
| 821-05-29 | | automatic route release | |
| 821-05-30 | | automatic working of a route | |
| 821-05-31 | | route-programme machine | |
| 821-05-32 | | cancellation device | |
| 821-05-33 | | emergency release | |
| 821-05-34 | | emergency replacement switch | |
| 821-05-35 | | approach locking | |
| 821-05-36 | | approach locking section | |
| 821-05-37 | | approach control | |
| 821-05-38 | | approach section | |
| 821-05-39 | | directional control | |
| 821-05-40 | | non-presetting control | |
| 821-05-41 | | presetting control | |
| 821-05-42 | | point release button | |
| 821-05-43 | | opposing locking | |
| 821-05-44 | | sequential locking | |
| 821-05-45 | | rotation locking | |
| 821-05-46 | | continuity locking | |
| 821-05-47 | | all relay interlocking | |
| 821-05-48 | | computer controlled relay interlocking | |
| 821-05-49 | | geographical circuit interlocking | |
| 821-05-50 | | free wiring | |
| 821-05-51 | | electric lock | |
| 821-05-52 | | combined electric lock and circuit controller | |
| 821-05-53 | | safety relay | |
| 821-05-54 | | break contact | |
| 821-05-55 | | make contact | |
| 821-05-56 | | change-over contact | |
| 821-05-57 | | reverse contact | |
| 821-05-58 | | normal contact | |
| 821-05-59 | | single-element relay | |
| 821-05-60 | | two-element relay | |
| 821-05-61 | | bistable relay | |
| 821-05-62 | | three-position relay | |
| 821-05-63 | | relay set | |
| 821-05-64 | | repeater relay | |
| 821-05-65 | | signal proving | |
| 821-05-66 | | signal lamp proving | |
| 821-05-67 | | signal light proving | |
| 821-05-68 | | key lock | |
| 821-05-69 | | key transmitter | |
| 821-05-70 | | speed discriminator | |
| 821-05-71 | | time release | |
| 821-05-72 | | absolute detection | |
| 821-05-73 | | continuous detection | |
| 821-05-74 | | transient detection | |
| 821-05-75 | | solid state interlocking | |
| 821-05-76 | | redundancy, <in a system> | |
| 821-05-77 | | redundancy management | |
| 821-05-78 | | self testing | |
| 821-05-79 | | divergence, <in a redundant sytem> | |
| 821-05-80 | | right-side failure | |
| 821-05-81 | | wrong-side failure | |
| 821-05-82 | | availability, <of a product> | |
| 821-05-83 | | repairable modular redundancy | |
| 821-05-84 | | processor interlocking | |
| 821-05-85 | | panel multiplexer | |
| 821-05-86 | | technician's terminal | |
| 821-05-87 | | data preparation | |
| 821-05-88 | | safe data transmission | |
| 821-05-89 | | data link, <in railway signalling> | |
| 821-05-90 | | data link module, <in railway signalling> | |
| 821-05-91 | | signal module | |
| 821-05-92 | | points module | |
| 821-05-93 | | train detection module | |
| 821-05-94 | | integrated electronic control centre | |
| 821-05-95 | | signalman's control and display system | |
| 821-05-96 | | automatic route setting equipment | |
| 821-05-97 | | timetable processor | |
| 821-05-98 | | train describer | |
| 821-05-99 | | identification entry | |
| 821-05-100 | | progression system | |
Section 821-06: Block signalling system | |
| 821-06-01 | | block system | |
| 821-06-02 | | block section | |
| 821-06-03 | | absolute block | |
| 821-06-04 | | permissive block | |
| 821-06-05 | | absolute permissive block | |
| 821-06-06 | | automatic block | |
| 821-06-07 | | partly permissive automatic block | |
| 821-06-08 | | manual block | |
| 821-06-09 | | interlocking block | |
| 821-06-10 | | telephone block | |
| 821-06-11 | | fixed block | |
| 821-06-12 | | moving block | |
Section 821-07: Level crossing protection | |
| 821-07-01 | | level crossing | |
| 821-07-02 | | road warning device | |
| 821-07-03 | | road barrier | |
| 821-07-04 | | full barrier | |
| 821-07-05 | | half-barrier | |
| 821-07-06 | | half-barrier level crossing | |
| 821-07-07 | | double half-barrier level crossing | |
| 821-07-08 | | manually controlled level crossing | |
| 821-07-09 | | automatic level crossing | |
| 821-07-10 | | indication of an automatic level crossing | |
| 821-07-11 | | cycle duration | |
| 821-07-12 | | striking-in distance | |
| 821-07-13 | | barrier machine | |
| 821-07-14 | | automatic danger zone detector | |
Section 821-08: Automatic train protection | |
| 821-08-01 | | automatic train protection system | |
| 821-08-02 | | automatic train control system | |
| 821-08-03 | | train speed supervision | |
| 821-08-04 | | cab signalling | |
| 821-08-05 | | acknowledge button | |
| 821-08-06 | | vigilance device | |
| 821-08-07 | | automatic warning system | |
| 821-08-08 | | automatic train stop | |
| 821-08-09 | | automatic train stop override | |
| 821-08-10 | | train stop | |
| 821-08-11 | | braking speed supervision | |
| 821-08-12 | | partial supervision | |
| 821-08-13 | | locomotive magnet | |
| 821-08-14 | | track magnet | |
| 821-08-15 | | beacon, <in signalling> | |
| 821-08-16 | | transponder, <in signalling> | |
| 821-08-17 | | active beacon | |
| 821-08-18 | | track conductor system | |
| 821-08-19 | | continuous automatic train protection transmission system | |
| 821-08-20 | | intermittent automatic train protection transmission system | |
| 821-08-21 | | release at red signal, <in an intermittent automatic train protection transmission system> | |
| 821-08-22 | | track-to-train transmission | |
| 821-08-23 | | advance warning cab signalling | |
| 821-08-24 | | service braking distance | |
| 821-08-25 | | emergency braking distance | |
| 821-08-26 | | target distance | |
| 821-08-27 | | target speed | |
| 821-08-28 | | infill information point, <in an intermittent automatic train protection transmission system> | |
Section 821-09: Automatic train operation | |
| 821-09-01 | | automatic train operation | |
| 821-09-02 | | wheel revolution counter | |
| 821-09-03 | | control location, <in an automatic train operation system> | |
| 821-09-04 | | executive point, <in an automatic train operation system> | |
| 821-09-05 | | train location, <in an automatic train operation system> | |
| 821-09-06 | | zero point, <in an automatic train operation system> | |
| 821-09-07 | | radio automatic train operation | |
| 821-09-08 | | automated urban guided transport | |
| 821-09-09 | | automatic mode | |
| 821-09-10 | | driverless train operation | |
| 821-09-11 | | non-automated train operation | |
| 821-09-12 | | on-sight train operation | |
| 821-09-13 | | semi-automated train operation | |
| 821-09-14 | | unattended train operation | |
Section 821-10: Miscellaneous | |
| 821-10-01 | | hot box detector | |
| 821-10-02 | | fall detector | |
| 821-10-03 | | bridge displacement detector | |
| 821-10-04 | | land-slide detector | |
Section 821-11: Communication in transmission systems | |
| 821-11-01 | | absolute time stamp | |
| 821-11-02 | | access protection | |
| 821-11-03 | | additional data, pl | |
| 821-11-04 | | authentic message | |
| 821-11-05 | | authenticity | |
| 821-11-06 | | closed transmission system | |
| 821-11-07 | | confidentiality | |
| 821-11-08 | | corrupted message | |
| 821-11-09 | | cryptographic technique | |
| 821-11-10 | | cyclic redundancy check, <for communication in transmission systems> | |
| 821-11-11 | | data, <for communication in transmission systems> pl | |
| 821-11-12 | | implicit data, pl | |
| 821-11-13 | | data corruption | |
| 821-11-14 | | defence | |
| 821-11-15 | | delayed message | |
| 821-11-16 | | deleted message | |
| 821-11-17 | | double time stamp | |
| 821-11-18 | | error | |
| 821-11-19 | | failure, <of an item> | |
| 821-11-20 | | fault, <in a system> | |
| 821-11-21 | | feedback message | |
| 821-11-22 | | hacker | |
| 821-11-23 | | hazard analysis | |
| 821-11-24 | | information, <in a process> | |
| 821-11-25 | | inserted message | |
| 821-11-26 | | integrity, <of information> | |
| 821-11-27 | | manipulation detection code | |
| 821-11-28 | | masqueraded message | |
| 821-11-29 | | message, <in transmission systems> | |
| 821-11-30 | | message authentication code | |
| 821-11-31 | | message enciphering | |
| 821-11-32 | | message errors, pl | |
| 821-11-33 | | message integrity | |
| 821-11-34 | | message stream | |
| 821-11-35 | | non-cryptographic safety code | |
| 821-11-36 | | open transmission system | |
| 821-11-37 | | port, <for signalling and telecommunications apparatus> | |
| 821-11-38 | | random failure | |
| 821-11-39 | | redundancy check | |
| 821-11-40 | | redundant data, pl | |
| 821-11-41 | | relative time stamp | |
| 821-11-42 | | repeated message | |
| 821-11-43 | | resequenced message | |
| 821-11-44 | | safe fall-back state | |
| 821-11-45 | | safety code | |
| 821-11-46 | | safety integrity level | |
| 821-11-47 | | safety reaction | |
| 821-11-48 | | sequence number | |
| 821-11-49 | | source and destination identifier | |
| 821-11-50 | | systematic failure | |
| 821-11-51 | | threat | |
| 821-11-52 | | time stamp | |
| 821-11-53 | | timeliness | |
| 821-11-54 | | transmission code | |
| 821-11-55 | | transmission system, <in communication, signalling and processing systems> | |
| 821-11-56 | | unauthorized access | |
| 821-11-57 | | user data, pl | |
| 821-11-58 | | valid message | |
| 821-11-59 | | validity | |
Section 821-12: Reliabilty, availability, maintainability and safety | |
| 821-12-01 | | accepting body | |
| 821-12-02 | | accident | |
| 821-12-03 | | apportionment | |
| 821-12-04 | | assessment | |
| 821-12-05 | | assessor | |
| 821-12-06 | | authorization | |
| 821-12-07 | | causal analysis | |
| 821-12-08 | | COTS software | |
| 821-12-09 | | commissioning | |
| 821-12-10 | | common cause failures, pl | |
| 821-12-11 | | compliance, <in signalling> | |
| 821-12-12 | | configuration | |
| 821-12-13 | | configuration management | |
| 821-12-14 | | consequence analysis | |
| 821-12-15 | | cross-acceptance | |
| 821-12-16 | | design | |
| 821-12-17 | | design authority | |
| 821-12-18 | | designer | |
| 821-12-19 | | diversity | |
| 821-12-20 | | failure mode | |
| 821-12-21 | | failure rate | |
| 821-12-22 | | fault detection time | |
| 821-12-23 | | fault tolerance, <in signalling> | |
| 821-12-24 | | firmware, <in signalling> | |
| 821-12-25 | | function, <of a product> | |
| 821-12-26 | | generic software | |
| 821-12-27 | | hazard log | |
| 821-12-28 | | human error | |
| 821-12-29 | | implementation | |
| 821-12-30 | | implementer | |
| 821-12-31 | | functional independence | |
| 821-12-32 | | human independence | |
| 821-12-33 | | physical independence | |
| 821-12-34 | | individual risk | |
| 821-12-35 | | logistic support | |
| 821-12-36 | | mission | |
| 821-12-37 | | mission profile | |
| 821-12-38 | | negation | |
| 821-12-39 | | negation time | |
| 821-12-40 | | product, <in signalling> | |
| 821-12-41 | | programmable logic controller | |
| 821-12-42 | | railway authority | |
| 821-12-43 | | railway infrastructure authority | |
| 821-12-44 | | railway support industry | |
| 821-12-45 | | random failure integrity | |
| 821-12-46 | | random fault | |
| 821-12-47 | | RAM programme | |
| 821-12-48 | | rolling stock operator | |
| 821-12-49 | | safe state | |
| 821-12-50 | | safety acceptance | |
| 821-12-51 | | safety approval | |
| 821-12-52 | | safety authority | |
| 821-12-53 | | safety case | |
| 821-12-54 | | safety integrity | |
| 821-12-55 | | safety life cycle | |
| 821-12-56 | | safety management | |
| 821-12-57 | | safety plan | |
| 821-12-58 | | safety process | |
| 821-12-59 | | safety regulatory authority | |
| 821-12-60 | | safety-related software | |
| 821-12-61 | | software | |
| 821-12-62 | | software maintainability | |
| 821-12-63 | | software maintenance | |
| 821-12-64 | | software safety integrity level | |
| 821-12-65 | | stress profile | |
| 821-12-66 | | system life cycle | |
| 821-12-67 | | system safety integrity level | |
| 821-12-68 | | systematic failure integrity | |
| 821-12-69 | | systematic fault, <in signalling> | |
| 821-12-70 | | technical safety report | |
| 821-12-71 | | tolerable risk | |
| 821-12-72 | | validation | |
| 821-12-73 | | validator | |
| 821-12-74 | | verification | |
| 821-12-75 | | verifier | |
| |