The meaning of the Acronym HD is...

HD is

• Half Duplex

More Meanings For HD:

• Hard Drive
• Host Directory
• Help Desk
• Hard Disk
• High Density
• Half Duplex
• Harmonised Document
• Horse Dung
• Hopelessly Deaf
• Horrible and Detrimental
• A Half Degree
• High Density
• Hardware Design
• High Desert
• Hausdorff Dimension

HD is also in:

• Academic Degrees
• Chat
• Electronics
• General
• Geology
• Hardware
• Mathematics
• Networking
• Software