HMS meaning in Governmental ?

Answer:

What is Her Majesty's Service mean?

O.H.M.S., an initialism for On Her Majesty's Service or On His Majesty's Service (depending on the gender of the reigning monarch), is an official franking commonly seen on correspondence from government departments in the United Kingdom, Canada, Australia and other countries that share the same monarch as their head of state (now known as Commonwealth realms).

In Canada, O.H.M.S. may be written on an envelope instead of using postage stamps for any letters being sent to the House of Commons of Canada or to any member of the Parliament of Canada. Letters sent from Lieutenant-Governors may also bear the O.H.M.S. mark.

In Australia before Federation, letters in envelopes franked with the O.H.M.S. mark were exempt from postal fees.

reference

Full Form	Category
High Mass Star	Academic & Science
Hybrid Male Sterility	Academic & Science
Howard Medical Science	Academic & Science
Hydrologic Modeling System	Academic & Science
Hazard Mitigation Survey	Academic & Science
Hellenic Mathematical Society	Academic & Science
Ελληνική Μαθηματική Εταιρεία	Academic & Science
Ellenike Mathematike Etaireia	Academic & Science
Homeshore (ak)	Airport Code
Hydraulic Module Speed	Business
Hitachi Micro Systems	Business
Hughes Missile Systems	Business
Home Marketing Services	Business
Heavy Metal System	Business
Heavy Metal Scrap	Business
Hennessey Motor Sports	Business
Health Management Systems	Business
Highpower Management System	Business
Hospitality Management Solution	Business
Homeowner Management Services	Business Management
Hedge Management System	Business Management
Huntingdon Middle School	Community
Henry Middle School	Community
Hendersonville Middle School	Community
Hartsville Middle School	Community
Hastings Middle School	Community
Hawkins Middle School	Community
Headland Middle School	Community
Hedrick Middle School	Community
Hudson Middle School	Community
Harrison Middle School	Community
Hindu Marriage System	Community
Highland Middle School	Community
T. L. Handy Middle School	Community
Hutto Middle School	Community
Herndon Middle School	Community
Housing Management System	Community
Hanover Middle School	Community
William Hubbard Middle School	Community
Harmony Middle School	Community
Harris Middle School	Community
Hally Middle School, Detroit, Michigan	Community
Hawk Mountain Sanctuary	Community
Hamburg Middle School	Community
Heritage Middle School	Community
Harvest Middle School	Community
Hays Middle School	Community
Home Missionary Service	Community
Hammarskjold Middle School	Community
He's My Savior	Community
Hillcrest Middle School	Community
Hartley Melvin Sanborn	Community
Home Multimedia Software	Community
Harding Middle School	Community
Hamden Middle School	Community
Hampton Middle School	Community
Hillsborough Middle School	Community
Homewood Middle School	Community
Hurricane Middle School	Community
Hampshire Middle School	Community
Hinsdale Middle School	Community
Hillside Middle School	Community
Hahira Middle School	Community
Huntington Middle School	Community
Hardin Middle School	Community
Hamlin Middle School	Community
Haverford Middle School	Community
Hardware Memory Scrubber	Computer Hardware
Hardware Maintenance Reference Manual	Computing
Hardware Maintenance and Service	Computing
Headend Management System	Computing
Home Media Server	Computing
Hardware Meets Software	Computing
Huawei Mobile Services	Computing
Mens' Organic Hemp Slacks (Hemp Mens' Slacks)	General
Hamann Motorsport	General
Homestead Miami Speedway	General
Hickory Motor Speedway	General
Helsinki Motor Show	General
Hannover Motor Show	General
Historic Motor Sports	General
Hino Motors Sales	General
Hyundai Motor Securities	General
Hyundai Motor Singapore	General
Hyundai Motorstudio	General
Heavy Melting Steel	General
Hunting Melin Sons	General
Heroically Manned Starship	General
Her/His Majesty's Ship	General
His/Her Majesty's Ship	General
Heavy melting scrap	General
Her Majesty s	General
Hazard Mapping System	General
His Majesty s	General
Harold Marshall Sylvester	General
Hollowcore Manufacturing System	General
Hodg Man S	General
Hydrologic Micro Services	General
Hotel Management System	General
Headland Management System	Governmental
Hazardous Materials Safety	Governmental
Akhil Bharatiya Hindu Mahasabha	Governmental
His Majesty's Ship	Governmental
Her Majesty's Ship	Governmental
His Majesty's Service	Governmental
Here's My Ship	Governmental
Highly Migratory Species	Governmental
Her Majesty's Service	Governmental
Homicide at Mitre Square	Governmental
Happy Mask Salesman	Internet
Hours Minutes Seconds	Measurement Unit
HyperMutation Somatic	Medical
Home Medical Service	Medical
High-Magnitude Stressor	Medical
Hidalgo Medical Services	Medical
Harvard Medical School's	Medical
Healthcare Management Systems	Medical
Healthcare Management System	Medical
Health Management System	Medical
HyperMobility Syndrome	Medical
Heroes of Medicine and Science	Medical
Hypertension Management Software	Medical
Harvard Medical School	Medical
Hospital Management System	Medical
Heavy Materiel Supply	Military and Defence
Helmet Mounted Sight	Military and Defence
Hour Minute Second	Military and Defence
Home Management Service	Networking
Hybrid Management Sub-layer	Networking
High-mast System	Radio Science
Hotel Management Software	Softwares
History Memory System	Space Science