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- HH
- HH-1
- HH-1H Huey
- HH-1H Iroquois
- HH-1K
- HH-1 Huey
- HH-2
- HH-2D
- HH-3
- HH-30
- HH-3E
- HH-3E Jolly Green Giant
- HH-3E Sea King
- HH-3F Pelican
- HH-3 Jolly Green Giant
- HH-3 Pelican
- HH-43
- HH-43B Huskie
- HH-43 Huskie
- HH-46
- HH-47
- HH-52
- HH-52A
- HH-52A Seaguard
- HH-52 Seaguard
- HH-53
- HH-53B
- HH-53C
- HH-53 "Super Jolly"
- HH-53 Super Jolly Green Giant
- HH-60
- HH-60G
- HH-60G Pave Hawk
- HH-60G Pavehawk
- HH-60H Rescue Hawk
- HH-60J
- HH-60J Jay Hawk
- HH-60J Jayhawk
- HH-60 Jayhawk
- HH-60 Pave Hawk
- HH-60 Pavehawk
- HH-65
- HH-65A
- HH-65A Dolphin
- HH-65B
- HH-65B Dolphin
- HH-65C
- HH-65C Dolphin
- HH-65 Dauphin
- HH-65 Dolphin
- HH-Ferries
- HH-suite
- HH0
- HH00
- HH01
- HH02
- HH03
- HH04
- HH05
- HH06
- HH07
- HH08
- HH09
- HH1
- HH10
- HH11
- HH12
- HH13
- HH14
- HH15
- HH16
- HH17
- HH18
- HH19
- HH1FOO
- HH2
- HH20
- HH20B
- HH21
- HH2G
- HH3
- HH3E Sea King
- HH4
- HH5
- HH5915
- HH6
- HH7
- HH8
- HH9
- HH:MM:SS
- HHA
- HHA01
- HHA02
- HHA03
- HHA04
- HHA06
- HHA07
- HHA08
- HHA09
- HHA1
- HHA10
- HHA2
- HHA3
- HHA4
- HHA5
- HHA6
- HHA7
- HHA8
- HHA9
- HHAS
- HHAT
- HHA Beach
- HHA Class DT1
- HHA Class DT2
- HHA Class DT3
- HHA Class DT4
- HHA Hamburg Airways Luftverkehrsgesellschaft mbH
- HHA Services
- HHA Type A
- HHA Type DT1
- HHA Type DT2
- HHA Type DT3
- HHA Type DT4
- HHA Type DT5
- HHA Type T
- HHB
- HHBC
- HHBC (computer programming)
- HHBE
- HHBTM
- HHBTMR
- HHBV epsilon
- HHB (disambiguation)
- HHB 1-102nd Field Artillery Forward
- HHB 1-102nd Field Artillery Forward - Rear Area Operations Center (RAOC)
- HHB International
- HHC
- HHC, UASTB
- HHC1
- HHCB
- HHCD
- HHCL
- HHCRO funding
- HHCTC
- HHCTCP
- HHC (disambiguation)
- HHC Hardenberg
- HHCode
- HHCys
- HHD
- HHDDVVDDBVD
- HHDL
- HHDN
- HHDP
- HHD (disambiguation)
- HHE
- HHES
- HHEX
- HHEX (gene)
- HHF
- HHF2
- HHF3
- HHFA
- HHFC
- HHFCE
- HHFT
- HHF Architects
- HHG
- HHG1
- HHG2G
- HHG2TG
- HHGB
- HHGFAA
- HHGG
- HHGTG
- HHGTTG
- HHG Corporation
- HHGoA
- HHGregg
- HHGttG
- HHH
- HHHCSD
- HHHH
- HHHHSW
- HHHH (film)
- HHHL
- HHHR Tower
- HHHS
- HHH (disambiguation)
- HHH (wrestler)
- HHH Metrodome
- HHH Tower
- HHH syndrome
- HHH therapy
- HHI
- HHI-score
- HHIC Phil
- HHID
- HHIG
- HHIP
- HHIP (gene)
- HHI (disambiguation)
- HHI score
- HHJ
- HHJ (disambiguation)
- HHK
- HHKB
- HHK School
- HHL
- HHLA
- HHLV
- HHL (disambiguation)
- HHL Algorithm
- HHL Leipzig Graduate School of Management
- HHM
- HHMI
- HHMM
- HHMS
- HHMS (ship)
- HHMS Amfitriti (S-17)
- HHMS Kaimiloa
- HHM - Hungarian Hope Movement
- HHM Herbert
- HHM – Hungarian Hope Movement
- HHN
- HHNE
- HHNF
- HHNH
- HHNK
- HHNKC
- HHNS
- HHO
- HHOF
- HHOP
- HHO (disambiguation)
- HHO Gas
- HHO Multimedia
- HHO cell
- HHO gas
- HHP
- HHP-8
- HHPA
- HHPC
- HHPS
- HHP (disambiguation)
- HHP (inc)
- HHQ
- HHQ-9
- HHR
- HHR (disambiguation)
- HHR Samarasinghe
- HHS
- HHS-Lions
- HHS1987
- HHS78
- HHSAA State Football Championship/Oahu Prep Bowl
- HHSAA State Football Championship/Prep Bowl
- HHSAA State Football Championships
- HHSAA State Football Championships/Oahu Prep Bowl
- HHSB
- HHS (New Jersey)
- HHS (disambiguation)
- HHS (high schools) (disambiguation)
- HHS Deputy Secretary
- HHS Glasgow
- HHS Mandate
- HHS OIG
- HHS Secretary
- HHS mandate
- HHSh
- HHT
- HHT1
- HHTDD
- HHTVB
- HHT (disambiguation)
- HHU
- HHUS
- HHU (disambiguation)
- HHV
- HHV-1
- HHV-2
- HHV-3
- HHV-4
- HHV-5
- HHV-6
- HHV-7
- HHV-8
- HHV6
- HHV7
- HHV8
- HHVM
- HHVM and HipHop
- HHV (disambiguation)
- HHV Infected Cell Polypeptide 0
- HHV Infected Cell Polypeptide 0 (ICP0)
- HHV LAT
- HHV Latency Associated Transcript
- HHV capsid portal protein
- HHW
- HHX
- HHY
- HH (Court Street Shuttle)
- HH (NYCS)
- HH (New York City Subway service)
- HH (New York City Subway service) (disambiguation)
- HH (Rockaway Local)
- HH (Rockaway Shuttle)
- HH (disambiguation)
- HH 1
- HH 34
- HH 47
- HH 80
- HH 81
- HH And
- HH Andromedae
- HH Armstrong
- HH Asquith
- HH Bennett
- HH Bennett Studio
- HH Bhakti Caitanya Maharaj
- HH Bhakti Caitanya Swami
- HH Bhakti Caitanya Swami Maharaj
- HH Bhakti Caru Maharaj
- HH Bhakti Caru Swami
- HH Bhakti Caru Swami Maharaj
- HH Bhakti Chaitanya Maharaj
- HH Bhakti Chaitanya Swami
- HH Bhakti Chaitanya Swami Maharaj
- HH Bhakti Charu Maharaj
- HH Bhakti Charu Swami
- HH Bhakti Charu Swami Maharaj
- HH Bhakti Svarupa Damodar Maharaj
- HH Bhakti Svarupa Damodar Swami
- HH Bhakti Svarupa Damodar Swami Maharaj
- HH Bhakti Svarupa Damodara Maharaj
- HH Bhakti Svarupa Damodara Swami
- HH Bhakti Svarupa Damodara Swami Maharaj
- HH Bhakti Swami Maharaj
- HH Bhakti Swarupa Damodar Maharaj
- HH Bhakti Swarupa Damodar Swami
- HH Bhakti Swarupa Damodar Swami Maharaj
- HH Bhakti Swarupa Damodara Maharaj
- HH Bhakti Swarupa Damodara Swami
- HH Bhakti Swarupa Damodara Swami Maharaj
- HH Bhakti Tirtha Maharaj