| HTML | Hypertext Markup Language |
| HDFC | Housing Development Finance Corporation |
| HSBC | Hong-Kong and Shanghai Banking Corporation |
| HSC | Higher Secondary Certificate |
| HDMI | High Definition Multimedia Interface |
| HVAC | Heating Ventilation and Air Conditioning |
| HTC | High Tech Computer |
| HIV | Human Immunodeficiency Virus |
| HBD | Happy Birthday |
| HP | Hewlett-Packard |
| HUDCO | Housing and Urban Development Corporation Limited |
| HTTP | HyperText Transfer protocol |
| HTH | Hope This Helps |
| HF | Have fun |
| HMB | Hit me back |
| HTET | Haryana Teacher Eligibility Test |
| HSSC | Haryana Staff Selection Commission |
| HDT Time Zone | Hawaii-Aleutian Daylight Time (Daylight Saving Time) |
| HKT Time Zone | Hong Kong Time (Standard Time) |
| HOVST Time Zone | Hovd Summer Time (Daylight Saving Time) |
| HOVT Time Zone | Hovd Time (Standard Time) |
| HST Time Zone | Hawaii Standard Time (Standard Time) |
| HTTPs | Hyper Text Transfer protocol secure |
