Head space refers to the space between the level of the contents in the neck of a container and the closure. Head space is intended to furnish room for expansion of product due to heat or other action after packing.

A hog is a pig, another animals in the Suidae family, including: Red River Hog and Giant forest hog.

Hog is also an industrial machine.

The Human Development Index (HDI) is a statistic composite index of life expectancy, education (mean years of schooling completed and expected years of schooling upon entering the education system), and per capita income indicators, which is used to rank countries into four tiers of human development. A country scores a higher level of HDI when the lifespan is higher, the education level is higher, and the gross national income GNI (PPP) per capita is higher.

Another meaning is High Density Interconnect.

In the industrial/industry context, HDD stands for "hard disk drive," which is a data storage device that uses magnetic storage to store and retrieve digital information. HDDs are commonly used in computers, servers, and other electronic devices that require high-capacity data storage.

In the industrial or industry context, "Halal" refers to products or processes that are permissible according to Islamic law.

Deutsch: Mobilgerät / Español: Dispositivo móvil / Português: Dispositivo móvel / Français: Appareil mobile / Italiano: Dispositivo mobile
A mobile device (also known as a handheld computer or simply handheld/hand-held) is a small, handheld computing device, typically having a display screen with touch input and/or a miniature keyboard and weighing less than one kg.

Deutsch: Kopfhörer / Español: Auriculares - Auriculares / Português: Fones de ouvido - Fones de ouvido / Français: Casque audio - Casque audio / Italiano: Auricolari - Auricolari
Headphones are a pair of small loudspeakers that are designed to be held in place close to a user's ears. They are also known as earspeakers, earphones or, colloquially, cans. The alternate in-ear versions are known as earbuds or earphones.

Deutsch: Gefährdung / Español: Peligro / Français: Danger / Italiano: Pericolo
A hazard is a situation that poses a level of threat to life, health, property, or environment. Most hazards are dormant or potential, with only a theoretical risk of harm; however, once a hazard becomes "active", it can create an emergency situation. A hazardous situation that has come to pass is called an incident. Hazard and possibility interact together to create risk.