Radio and Television Communication Equipment, Except Airborne - Canada (CA)

Federal Supply Class (FSC): 5820

NATO Supply Classification Class (NSC): 5820

Federal Supply Group (FSG): 58 Communication, Detection, and Coherent Radiation Equipment

NATO Supply Classification Group (NSG): 58 Communication, Detection, and Coherent Radiation Equipment

Items Managed by Canada (CA) - NCB is 20 or 21

Page 8 of 35

NSN Format for Radio and Television Communication Equipment, Except Airborne
Codified by Canada

582021XXXXXXX
Group
FSG
ClassNCBIdentifier
FSC
Federal Supply Class
NIIN
NSN

NATO Supply Class 5820 is a classification for Radio and Television Communication Equipment, Except Airborne. It falls under NATO Supply Group 58, which is dedicated to Communication, Detection, and Coherent Radiation Equipment.

This supply class includes a wide range of equipment used for radio and television communication purposes. It encompasses devices such as radios, transceivers, broadcasting equipment, antennas, amplifiers, receivers, and other related communication equipment.

The equipment in this class is specifically designed for non-airborne applications, meaning it is not intended for use in aircraft or airborne operations. It is primarily used for ground-based communication systems, including both civilian and military applications.

The purpose of this classification system is to provide a standardized method for categorizing and organizing military supplies and equipment. By using NATO Supply Classes and Groups, it becomes easier for member nations to identify, procure, and maintain the necessary equipment for their military operations.

If you need more specific information about a particular item or have any other questions, feel free to ask!

FSC 5820 Radio and Television Communication Equipment, Except Airborne - Canada (CA)
FSC 5820 Radio and Television Communication Equipment, Except Airborne - Canada (CA)

Includes Telemetering Equipment.

Excludes Home Type Radio and Television Equipment.

Note-Excludes oscillator items which should be classified in FSC 5955 or 5963; fiber optic items which should be classified in Group 60; electronic modules as defined under Class 5963; and electrical cable, cord and wire assemblies, harnesses and sets, related to FSG 58 equipment (see FSC 5995). In Group 58, more than in any other group, it frequently happens that the same name is listed as an index entry in each of several classes. In addition, that name may also appear as an entry in groups other than 58. Each such entry refers to a distinctly different part or assembly, even though the different items have the same name. The listing of the same names in two or more classes indicates that, in one form, the part or assembly covered by the name is applicable to the equipment covered by one class, and in another form is applicable to the equipment covered by another class. For example, the item name CODER, AUDIO FREQUENCY is applicable to two distinctly different assemblies, one of which has an application in cryptologic equipment, covered by Class 5810, and the other in radar equipment covered by Class 5840. Consequently the name CODER, AUDIO FREQUENCY is an entry under each of the two classes. When an item identification bears a name which is indexed under more than one class of Group 58, or in Group 58 and in some other group, the item will be classified in the same class as its next higher assembly in the manner described in the Federal Logistics Information System (FLIS) Procedures Manual, DoD 4100.39-M. Also excluded from this group are data transmission and communications equipment such as terminals, sensors and other devices designed for use with a configuration of ADPE.

Frequently Asked Questions(FAQ) for Federal Supply Class 5820 Frequently Asked Questions(FAQ) for Federal Supply Class 5820

What is Federal Supply Class 5820?
FSC 5820 is the Federal Supply Class (formally known as NATO Supply Classification Class NSC 5820) in the USA for supply items codified in the category of Radio and Television Communication Equipment, Except Airborne.
What is NATO Supply Classification Class 5820?
NSC 5820 is the NATO Supply Classification Class (also known as Federal Supply Class FSC 5820 in the USA) for supply items codified in the category of Radio and Television Communication Equipment, Except Airborne.
Which Federal Supply Group is FSC 5820 in?
FSC 5820 is in Federal Supply Group (FSG) 58 which contains Communication, Detection, and Coherent Radiation Equipment.
Which NATO Supply Classification Group is NSC 5820 in?
NSC 5820 is in NATO Supply Classification Group (NSG) 58 which contains Communication, Detection, and Coherent Radiation Equipment.

Supply Items Included in Federal Supply Class 5820 Supply Items Included in Federal Supply Class 5820

What is a Television Camera? 203 Items
A Television Camera (CAMERA,TELEVISION) is a single component specifically designed to convert visual images (either still or in motion), utilizing an optical system and a light sensitive electron tube or light sensitive semiconductor elements, into electrical impulses. Control equipment may be included, For items with integral recording or integral recording and reproducing equipment, see CAMERA-RECORDING, VIDEO.
What is a Radio Frequency Tuning Unit? 23 Items
A Radio Frequency Tuning Unit (TUNING UNIT,RADIO FREQUENCY) is an electronic device consisting of the necessary elements to establish the frequency or frequency range of two or more tuned circuits to predetermined value or range. It may have facilities for calibration adjustments. There are no integral facilities for continuous variation of the frequency over the entire range of the item. It is generally used with an external variable capacitor or inductor which will effect the continuous variation of the frequency. This item is used to facilitate rapid band or channel changes in radio receivers, transmitters, amplifiers or similar devices. It does not include electron tubes. See also COIL ASSEMBLY, RADIO FREQUENCY and TUNER, RADIO FREQUENCY.
What is a Demultiplexer Subassembly? 10 Items
A Demultiplexer Subassembly is two or more different types of items having a common mounting or mounted on each other which together form a portion of a demultiplexer, but which in themselves are not a complete functioning item and cannot be assigned a more definite item name.
What is a Radio Frequency Tuner? 37 Items
A Radio Frequency Tuner (TUNER,RADIO FREQUENCY) is an electronic device consisting of the necessary elements to establish the upper and lower limits and to effect the variation (continuous or in steps) of the frequency of a tuned circuit by means of an integral variable capacitor, inductor, cavity or line. It is generally used for tuning radio receivers, transmitters, amplifiers, or similar items. It does not include electron tubes. See also TUNING UNIT, RADIO FREQUENCY.
What is a Radio Set Control? 37 Items
A Radio Set Control (CONTROL,RADIO SET) is a single component that determines the mode of operation of a radio set.
What is a Radio Repeater? 31 Items
A Radio Repeater (REPEATER,RADIO) is an item designed to receive, amplify electronically, and automatically retransmit the received signal, either by high fidelity reproduction or with such modulation on the signal as may be desired.
What is a Receiver-Transmitter Subassembly? 48 Items
A Receiver-Transmitter Subassembly is two or more different types of items, having a common mounting or mounted on each other, which together form a portion of a receiver-transmitter, but which in itself is not a complete functioning item and cannot be assigned a more definite item name.
What is a Television Camera Set? 16 Items
A Television Camera Set (CAMERA SET,TELEVISION) is a group of one or more items consisting of a CAMERA, TELEVISION and additional components which are required for the performance of a specific function or the expansion of the range of application. May exclude components supplied separately or available at the point of usage.
What is a Radio Transmitter? 85 Items
A Radio Transmitter (TRANSMITTER,RADIO) is a single component specifically designed to generate electrical signals of specific frequency and form, which, when fed to an antenna, will propagate radio frequency electromagnetic waves in space. May include facilities for amplification and/or integral modulator. See also TRANSMITTER, RADAR.
What is a Radio Receiver? 261 Items
A Radio Receiver (RECEIVER,RADIO) is a receiver used for reception of radio frequency electromagnetic waves transmitted through space exclusive of countermeasure, facsimile, loran, radar, television, and other specialized systems.
What is a Television Receiver? 44 Items
A Television Receiver (RECEIVER,TELEVISION) is a receiver for the display of signals propagated by a television transmitting set. May include audio channel. For items that do not include radio frequency components, see MONITOR, TELEVISION. See also INDICATOR, VIDEO.
What is a Radio Receiver-Transmitter? 826 Items
A Radio Receiver-Transmitter (RECEIVER-TRANSMITTER,RADIO) is a single component capable of performing the functions of a RECEIVER, RADIO; and TRANSMITTER, RADIO.
What is a Television Receiving Set? 30 Items
A Television Receiving Set (RECEIVING SET,TELEVISION) is a complete electronic set for the reception of signals propagated by a television transmitting set. May include audio channel. See also RECEIVER, TELEVISION.
What is a Radio Receiving Set? 21 Items
A Radio Receiving Set (RECEIVING SET,RADIO) is a complete electronic set specifically designed to intercept, demodulate and reproduce the radio frequency electromagnetic waves propagated by radio transmitter(s).
What is a Radio Transmitting Set? 24 Items
A Radio Transmitting Set (TRANSMITTING SET,RADIO) is a complete electronic set for the propagation of radio frequency electromagnetic waves in space.
What is a Radio Set? 149 Items
A Radio Set is a fixed number of components and/or items, not all having the same basic name, utilizing radio frequency electromagnetic waves in space to carry two-way intelligence. Excludes RADAR SET; FACSIMILE SET; RECEIVING SET, RADIO; RECEIVER-TRANSMITTER, RADIO; and RECEIVING SET, TELEVISION.
What is an Electronic Equipment Installation Kit? 168 Items
An Electronic Equipment Installation Kit (INSTALLATION KIT,ELECTRONIC EQUIPMENT) is items to include brackets, cables, and miscellaneous hardware used to provide a rapid installation and/or removal of electronic equipment, communication equipment and the like. For items consisting solely of assorted hand tools, see TOOL KIT (as modified). For items consisting solely of common and/or specially designed hardware specifically designed to secure electronic equipment, see HARDWARE KIT,ELECTRONIC EQUIPMENT.
What is a Radio Receiver-Transmitter Set? 68 Items
A Radio Receiver-Transmitter Set (RECEIVER-TRANSMITTER SET,RADIO) is two or more RECEIVER-TRANSMITTER, RADIO and accessories, such as battery chargers, spare batteries, or the like. Designed to provide two-way communications and basic minimum maintenance for this two-way communication equipment.
What is a Television Camera Lens? 103 Items
A Television Camera Lens (LENS,CAMERA,TELEVISION) is this lens is designed for use in a television/video camera and it will be used to photograph both near and distant objects. A device or a drive mechanism for automatic and/or power control of diaphragm and zoom may be included.
What is a Communication Matrix? 14 Items
A Communication Matrix (MATRIX,COMMUNICATION) is a unit that contains coordinate switches for interconnecting a number of inlet terminals and a number of outlet terminals by crosspoints which contain a connecting device such as a relay. See also SWITCHING GROUP, AUDIO FREQUENCY; SWITCHING GROUP, RADIO FREQUENCY; RELAY ASSEMBLY. Excludes MATRIX, COMPUTER; MATRIX, CODE.
What is an Electronic Communication Equipment Cover? 19 Items
An Electronic Communication Equipment Cover (COVER,ELECTRONIC COMMUNICATION EQUIPMENT) is a cover specifically designed for electronic communication equipment. It may be designed to protect against shock, vibration, dust and/or moisture.
What is an Audio-Video Switching Unit? 11 Items
An Audio-Video Switching Unit (SWITCHING UNIT,AUDIO-VIDEO) is an item that electrically and/or mechanically switches audio and/or video signals. It is designed to select audio/video inputs to be applied to specific outputs via manual control or remote control units. It allows signals to be switched to specific equipment such as monitors, recorders, editors and the like. It may be rack mounted or a stand alone unit.
What is a Camera Protective Housing? 16 Items
A Camera Protective Housing (HOUSING,PROTECTIVE,CAMERA) is an item specifically designed to enclose and/or protect a television camera, video camera and the like. It may include mounting facilities for additional components. It may or may not be of multi-piece construction. For items designed to cover photographic cameras see COVER, CAMERA, WEATHER PROTECTIVE.
What is a Line Of Sight Multi-Channel Radio Terminal? 12 Items
A Line Of Sight Multi-Channel Radio Terminal (RADIO TERMINAL,LINE OF SIGHT MULTI-CHANNEL) is an item that provides narrow band radio communications over a terrestrial link. This radio link can be established over two or more distinct radio bands and provides multi-channel capability in each of these bands. See also RADIO TERMINAL SET.
What is a Television Monitor? 275 Items
A Television Monitor (MONITOR,TELEVISION) is an item for the display of images transmitted over a closed electrical circuit by a compatible television camera. The item may include an audio channel, but does not include the radio frequency components required for reception of video signals from a television transmitting set. For items that include these components, see RECEIVER (1), TELEVISION. For items that provide similar data by means of other than closed circuit television, see INDICATOR, VIDEO.

Stock Items From Supply Class 5820 Stock Items From Supply Class 5820 Page 8 of 35

218487465
406-265-14
RNCC: 3 | RNVC: 2
218507459
2025-2
RNCC: 3 | RNVC: 2
218909535
LDX-12M
RNCC: 3 | RNVC: 2
218759869
CD3656226-0008-2
RNCC: 3 | RNVC: 2
218993751
DP-10
RNCC: 3 | RNVC: 2
218791898
MD33CFA1900-136-150-8MHZ
RNCC: 3 | RNVC: 2
219027814
32-1221
RNCC: 3 | RNVC: 2
218957799
PK-957K
RNCC: 3 | RNVC: 2
218555387
MS2559-1
RNCC: 3 | RNVC: 2
219066545
244-730701-001
RNCC: 3 | RNVC: 2
MARCOM 5
RNCC: 5 | RNVC: 2
218695576
830
RNCC: 3 | RNVC: 2
218972758
630-3016-003
RNCC: 3 | RNVC: 2
ON-5007(V)3/GRC-508(V)
RNCC: 3 | RNVC: 2
210413044
RA121B
RNCC: 3 | RNVC: 2
CV-5048/URR
RNCC: 5 | RNVC: 2
200066440
L20URS9PW1 N-KITA
RNCC: 3 | RNVC: 2
218678014
1816246-12
RNCC: 3 | RNVC: 2
1816246-2-12
RNCC: 3 | RNVC: 2
71-1003140
RNCC: 3 | RNVC: 2
219052489
630-3213-002
RNCC: 3 | RNVC: 2
AM-5318(V)2/GRC-508(V)
RNCC: 5 | RNVC: 2
219098861
AV-2751S
RNCC: 3 | RNVC: 2
218919636
5C3/157021
RNCC: 3 | RNVC: 2
218988460
XP44SXS1180BT
RNCC: 3 | RNVC: 2
218972740
630-3076-004
RNCC: 3 | RNVC: 2
OK-5045(V)4/GRC-508(V)
RNCC: 5 | RNVC: 2
218817941
127869-1
RNCC: 3 | RNVC: 2
C-5404/FRT-514
RNCC: 5 | RNVC: 2
219027794
10214-0300
RNCC: 3 | RNVC: 2
AN/GRC-509
RNCC: 5 | RNVC: 2
L53-501-000/LC-001
RNCC: 5 | RNVC: 2
218018219
CMC505-1631-003
RNCC: 3 | RNVC: 2
218848469
39689170-015
RNCC: 3 | RNVC: 2
219006995
1609R
RNCC: 3 | RNVC: 2
219026424
BR-835
RNCC: 3 | RNVC: 2
218695412
GL0BESPAN
RNCC: 3 | RNVC: 1
218925434
JM4740
RNCC: 3 | RNVC: 2
219132550
S58521
RNCC: 3 | RNVC: 2
218599088
245-800195-000
RNCC: 3 | RNVC: 2
218958307
DL-8415023-1
RNCC: 3 | RNVC: 2
218449277
189-585-18
RNCC: 3 | RNVC: 2
322-710418-701
RNCC: 3 | RNVC: 2
200026388
VSX-515-K
RNCC: 3 | RNVC: 2
218081590
810-0215-002
RNCC: 3 | RNVC: 2
218985740
TL2-8F26-C-2
RNCC: 3 | RNVC: 2
218822153
130-0204-002
RNCC: 3 | RNVC: 2
218462689
23-1059
RNCC: 3 | RNVC: 2
218873386
M203-306
RNCC: 3 | RNVC: 2
04-13385
RNCC: 5 | RNVC: 2
218956266
CC0/0
RNCC: 3 | RNVC: 2
218848608
39689170-008
RNCC: 3 | RNVC: 2
218974702
2MH10
RNCC: 3 | RNVC: 2
218768889
724-770
RNCC: 3 | RNVC: 2
219027095
24652
RNCC: 3 | RNVC: 2
218973637
SG60
RNCC: 3 | RNVC: 2
219025333
CR2-207
RNCC: 3 | RNVC: 2
218988468
V18-144MS
RNCC: 3 | RNVC: 2
219066234
WV-D5000
RNCC: 3 | RNVC: 2
218462063
547-5388-002
RNCC: 3 | RNVC: 2
218855449
58200282
RNCC: 3 | RNVC: 2
218957489
57-1346
RNCC: 3 | RNVC: 2
218573130
64D001885
RNCC: 3 | RNVC: 2
218855633
MZ23BBU1184
RNCC: 3 | RNVC: 2
218874156
0082-3825
RNCC: 3 | RNVC: 2
218745853
KXN1019A161-65MHZ
RNCC: 3 | RNVC: 2
0036-5790
RNCC: 6 | RNVC: 9
219039776
VS-220A
RNCC: 3 | RNVC: 2
218890642
T17110
RNCC: 3 | RNVC: 2
219007165
20-26
RNCC: 3 | RNVC: 2
218462796
455-970
RNCC: 3 | RNVC: 2
218929157
D61-40
RNCC: 3 | RNVC: 2
SA-5091/GRT
RNCC: 5 | RNVC: 2
218972678
652-6574-001
RNCC: 3 | RNVC: 2
218972752
630-3079-002
RNCC: 3 | RNVC: 2
OT-5010(V)2/GRC-508(V)
RNCC: 5 | RNVC: 2
219026419
8517168
RNCC: 3 | RNVC: 2
8517168-1
RNCC: 3 | RNVC: 2
219106035
TK-830
RNCC: 3 | RNVC: 2
218973627
XT1200A
RNCC: 3 | RNVC: 2
218695574
205
RNCC: 3 | RNVC: 2
CD2511
RNCC: 6 | RNVC: 9
218800195
QQA17RS
RNCC: 3 | RNVC: 2
218555363
MI581589
RNCC: 3 | RNVC: 2
200026359
100-812071-011
RNCC: 3 | RNVC: 2
RT-1814A/GRC-245A(V)
RNCC: 5 | RNVC: 2
218958361
KV-9200
RNCC: 3 | RNVC: 2
218925623
EVM-1710
RNCC: 3 | RNVC: 2
EVM-1710(X)
RNCC: 5 | RNVC: 2
218972579
618-7936-001
RNCC: 3 | RNVC: 2
218891678
VFM5T5WA
RNCC: 3 | RNVC: 2
218958312
6M-917 6"
RNCC: 3 | RNVC: 2
219037562
619-8000007-000
RNCC: 3 | RNVC: 2
219066525
8525309
RNCC: 3 | RNVC: 2
218874207
6628-0442
RNCC: 3 | RNVC: 2
219025943
VTR-2084
RNCC: 3 | RNVC: 2
VTR2084
RNCC: 3 | RNVC: 2
219029166
WV-CR12
RNCC: 3 | RNVC: 2
219051545
AN/PRC-113(V)3
RNCC: 3 | RNVC: 2
219098868
L-53-569-001/LC-000
RNCC: 3 | RNVC: 2
L-53-569-000/LC-000
RNCC: 5 | RNVC: 9
218987834
DL-8517116-1
RNCC: 3 | RNVC: 2
219027279
MS-60760B103
RNCC: 3 | RNVC: 2
218698785
MX-900
RNCC: 3 | RNVC: 2
219029169
WV-AD36
RNCC: 3 | RNVC: 2
200033863
SA-DX750
RNCC: 3 | RNVC: 2
219027784
10121-6300-03
RNCC: 3 | RNVC: 2
RF-1310-03
RNCC: 3 | RNVC: 2
T-5086/URT
RNCC: 5 | RNVC: 2
219200515
191-099755-905-012/POIN
RNCC: 3 | RNVC: 2
200040849
WV-LD2000A
RNCC: 3 | RNVC: 2
218802903
01-80709B93
RNCC: 3 | RNVC: 2
219143868
001-0002-011
RNCC: 3 | RNVC: 2
RM002D-16
RNCC: 5 | RNVC: 2
218413839
205
RNCC: 3 | RNVC: 2
218712161
61-01515-001REVT
RNCC: 3 | RNVC: 2
218956270
MCM-19L
RNCC: 3 | RNVC: 2
UC-392LP/WC
RNCC: 3 | RNVC: 2
218199846
53C
RNCC: 3 | RNVC: 2
218958309
5CO/157130
RNCC: 3 | RNVC: 2
218531920
791-3564-001
RNCC: 3 | RNVC: 2
219009153
WV-241P
RNCC: 3 | RNVC: 2
218972743
630-3076-007
RNCC: 3 | RNVC: 2
OK-5045(V)7/GRC-508(V)
RNCC: 5 | RNVC: 2
218679862
CLS58-176
RNCC: 3 | RNVC: 1
218986745
MH33BBU1114A
RNCC: 3 | RNVC: 2
218986741
RSMD
RNCC: 3 | RNVC: 2
218754783
356C4
RNCC: 3 | RNVC: 2
5821-1022
RNCC: 6 | RNVC: 9
218810545
804170
RNCC: 3 | RNVC: 2
804170-1
RNCC: 3 | RNVC: 2
IU225
RNCC: 3 | RNVC: 2
218151075
15590-1
RNCC: 3 | RNVC: 2
15590-01
RNCC: 3 | RNVC: 2
219054013
630-3189-004
RNCC: 3 | RNVC: 2
MT-5270(V)3/GRC-508(V)
RNCC: 5 | RNVC: 2
218972603
777-5895-001
RNCC: 3 | RNVC: 2
218560190
R5061SRC507V
RNCC: 3 | RNVC: 2
219027257
Q3330E
RNCC: 3 | RNVC: 2
218972773
622-3473-003
RNCC: 3 | RNVC: 2
T-5084/GRC
RNCC: 5 | RNVC: 2
218508923
RA222C
RNCC: 3 | RNVC: 2
218151067
15166-11
RNCC: 3 | RNVC: 2
15166-1
RNCC: 3 | RNVC: 2
218675593
617-6111-001
RNCC: 3 | RNVC: 2
219103281
19C852802P1
RNCC: 3 | RNVC: 2
218695419
SALVOR
RNCC: 3 | RNVC: 1
218421793
2835C6
RNCC: 3 | RNVC: 2
218545466
RA298C
RNCC: 3 | RNVC: 2
CV-5094/TSR-501
RNCC: 5 | RNVC: 2
210403329
308-786
RNCC: 3 | RNVC: 2
218412088
C65B48027
RNCC: 3 | RNVC: 2
218745182
26-00200-008
RNCC: 3 | RNVC: 2
218855218
NVA152
RNCC: 3 | RNVC: 2
218751054
635-4955-001
RNCC: 3 | RNVC: 2
218988470
TC1020N33Q
RNCC: 3 | RNVC: 2
219104867
FDL-X40
RNCC: 3 | RNVC: 2
218917687
PIPNO-13
RNCC: 3 | RNVC: 2
219103287
WVBL-200
RNCC: 3 | RNVC: 2
218801886
800914-2
RNCC: 3 | RNVC: 2
218870440
201005
RNCC: 3 | RNVC: 2
219035385
ME53C
RNCC: 3 | RNVC: 2
219068817
MARK1L/DBS-225.250
RNCC: 3 | RNVC: 2
218785207
801163
RNCC: 3 | RNVC: 2
ANWXQ1
RNCC: 3 | RNVC: 2
ANWXQ1
RNCC: 3 | RNVC: 2
218202294
BA153-34
RNCC: 3 | RNVC: 2
218873495
STR-3800
RNCC: 3 | RNVC: 2
219025948
DX400
RNCC: 3 | RNVC: 2
218596430
MT00-05-11
RNCC: 3 | RNVC: 2
218448674
DA25005
RNCC: 3 | RNVC: 2
AM-5205/FRT-508
RNCC: 5 | RNVC: 2
219007161
CT-1350
RNCC: 3 | RNVC: 2
218971262
31050-01
RNCC: 3 | RNVC: 2
218849768
TC1005H41
RNCC: 3 | RNVC: 2
218849766
XT1391AM
RNCC: 3 | RNVC: 2
219005961
69-2100(CRFS)
RNCC: 3 | RNVC: 2
218448910
CV5075FRR507
RNCC: 2 | RNVC: 2
211-3CN4CRY2975HZ
RNCC: 3 | RNVC: 2
212Z4CN2975HZ
RNCC: 3 | RNVC: 2
218599767
195-059
RNCC: 3 | RNVC: 2
218732971
718
RNCC: 3 | RNVC: 2
218945655
C53-251-000LC000
RNCC: 2 | RNVC: 2
AN/TRC-145
RNCC: 3 | RNVC: 2
ANTRC145
RNCC: 3 | RNVC: 2
ANTRC145WEQUIP
RNCC: 3 | RNVC: 2
L53-251-000LC000
RNCC: 3 | RNVC: 2