IDC

• Independent Democratic Conference, members of the New York State Senate
• Industrial Development Corporation, also known as Castle Grande, an Arkansas company involved in the Whitewater political controversy
• Industrial Development Corporation (South Africa), an agency of the South African Department of Economic Development
• Information Dominance Corps, a group of US Navy military information specialties
• Institute of Democracy and Cooperation, a think tank based in Paris
• Interactive Data Corporation, a financial services company
• InterDigital Communications, a telecommunications company
• Interdnestrcom, a mobile telephone broadband provider in Transnistria, Moldova
• International Data Corporation, a market research company
• International Detention Coalition, a non-government organization advocating for human rights
• Invensys Development Centre, a global common software development centre
• Islands District Council, the district council for the Islands District in Hong Kong

• Imperial Defence College, former name of the Royal College of Defence Studies, a British military academy (and post nominal letters used by graduates)
• Industrial Design Centre, part of IIT Bombay, India
• Institut de Cognitique, a school of engineering in France
• Institute of Design and Construction, a technical school in Brooklyn, NY, US
• Interdisciplinary Center Herzliya, the former name of Reichman University, Israel
• Paris Institute of Comparative Law, France

• Indirect costs, costs of economic overhead (like administration)

• Dilated cardiomyopathy, a disease of the heart muscle
• Immature dendritic cells, a type of dendritic cell
• Indwelling catheter, a tube inserted into the urinary bladder for drainage
• Infiltrating ductal carcinoma or invasive ductal carcinoma, a type of breast cancer

• Insulation-displacement connector, a connector that pierces the insulation on a wire

• Ideographic Description Characters
• Internet data center, a facility run by a service provider to house computer systems and associated components for their customers
• Inter-domain controller, implements Inter-domain Controller protocol for dynamic networking across administrative domains

• IDC (musician), a British musician
• "I Don't Care" (Ed Sheeran and Justin Bieber song), also referred to as "IDC"
• "IDC", a 2015 song by Chastity Belt from their album Time to Go Home
• "IDC", a 2023 song by Collar

• Ideographic Description Characters, symbols for describing the composition of CJK characters
• Independent duty corpsman, a US Navy medical staff position; see United States Marine Air-Ground Task Force Reconnaissance
• Industrial Development Certificate, UK planning licence from the late 1940s to early 1980s
• Intangible drilling costs, an oil and gas industry term
• "I don't care", in Internet/chat slang

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