NEST is an abbreviation for one of the following:

• The Nuclear Emergency Support Team, a team "prepared to respond immediately to any type of radiological accident or incident anywhere in the world"
• Novell Embedded Systems Technology, a former embeddable networking stack for small devices
• The Northland Emergency Services Trust, a search and rescue firm
• The Near East School of Theology
• The National Training Institute of Education, Science and Technology, a training institute set up by the Korea Ministry of Education, Science and Technology
• The Nonbiological Extraterrestrial Species Treaty, a fictional military alliance in
• National Employment Savings Trust, a new workplace pension scheme that all employers can use for their UK-based workers
• The NEural Simulation Tool, a simulator for large neural systems
• National Entrance Screening Test, an entrance exam conducted by the National Institute of Science Education and Research, Bhubaneswar

A nest is a structure built by certain animals to hold its eggs, its offspring, or occasionally the animal itself. Although nests are most closely associated with birds, members of all classes of vertebrates and some invertebrates construct nests. They may be composed of organic material such as twigs, grass, and leaves, or may be a simple depression in the ground, or a hole in a rock, tree, or building. Human-made materials, such as string, plastic, cloth, or paper, may also be used. Nests can be found in all types of habitat.