| C081 | CMOS | Complementary Metal–Oxide–Semiconductor | A technology used to construct integrated circuits in processors and cameras. | Used in digital camera sensors and microprocessors. |
| C082 | COTS | Commercial Off-The-Shelf | Readily available products not customized for a specific user. | Using COTS software in industrial automation. |
| C083 | CRC | Cyclic Redundancy Check | Error-detecting code used in digital networks and storage. | Ethernet packets use CRC for integrity checks. |
| C084 | CRT | Cathode Ray Tube | Display technology used in older television and monitor screens. | Found in legacy oscilloscopes and old TVs. |
| C085 | CSC | Common Service Center | Digital service access point for government and utility services. | Rural citizens access e-governance services via CSCs. |
| C086 | CSS | Cascading Style Sheets | Language for describing the presentation of web pages. | Used to style HTML websites. |
| C087 | CPU | Central Processing Unit | The brain of a computer responsible for executing instructions. | Intel i7 is a popular CPU model. |
| C088 | CPLD | Complex Programmable Logic Device | Reconfigurable digital logic device used in embedded systems. | Used in signal processing and control circuits. |
| C089 | CUI | Character User Interface | Interface where users interact via text commands. | Early DOS systems used CUI interfaces. |
| C090 | CUPS | Common UNIX Printing System | Modular printing system for UNIX-based OS. | Used for managing printers on Linux. |
| C091 | CV | Curriculum Vitae | Detailed summary of academic and professional achievements. | Submitted when applying for technical research jobs. |
| C092 | CW | Continuous Wave | A constant amplitude signal used in radio and radar. | CW laser beams used in industrial cutting. |
| C093 | CWR | Compressed Water Reactor | Nuclear reactor that uses water as coolant and moderator. | Used in nuclear power plants for electricity generation. |
| C094 | CAD | Computer-Aided Design | Software used to create precision drawings and models. | Engineers use AutoCAD for mechanical designs. |
| C095 | CAM | Computer-Aided Manufacturing | Software controlling machinery and production processes. | Used in CNC machining. |
| C096 | CAE | Computer-Aided Engineering | Simulation and analysis software for product development. | Used in stress testing car parts virtually. |
| C097 | CAP | Carrier Access Point | Wireless point allowing device connectivity. | Wi-Fi routers act as CAPs in networks. |
| C098 | CAS | Column Address Strobe | Signal that activates memory column addressing. | Part of DRAM timing in computers. |
| C099 | CAT | Computerized Adaptive Testing | Test system adjusting difficulty based on performance. | Used in GRE and GMAT exams. |
| C100 | CBC | Cipher Block Chaining | A mode of encryption using previous block data. | Used in AES encryption for secure communications. |
| C101 | CBD | Central Business District | Main commercial and business area in a city. | Downtown Manhattan is NYC’s CBD. |
| C102 | CBT | Computer-Based Training | Training delivered via digital platforms. | Corporate employees take CBT modules. |
| C103 | CC | Carbon Copy | Used in emails to send copies to additional recipients. | CC field in professional emails. |
| C104 | CCD | Charge-Coupled Device | Sensor for capturing images electronically. | Used in astronomy telescopes and cameras. |
| C105 | CCF | Critical Cooling Function | Essential function to prevent overheating in reactors. | Used in nuclear safety systems. |
| C106 | CCTV | Closed-Circuit Television | Video surveillance system. | Installed in banks and malls for monitoring. |
| C107 | CCU | Central Control Unit | Core unit managing operations in machinery or plants. | Used in industrial process automation. |
| C108 | CD | Compact Disc | Optical disc for data storage. | Audio albums distributed on CDs. |
| C109 | CDMA | Code Division Multiple Access | Wireless technology allowing multiple signals over one channel. | Used in 3G mobile communications. |
| C110 | CDN | Content Delivery Network | Distributed servers delivering web content efficiently. | Used by Netflix and YouTube for fast streaming. |
| C111 | CE | Conformité Européenne | Certification indicating EU safety compliance. | Electronic devices sold in Europe bear the CE mark. |
| C112 | CEE | Central and Eastern Europe | Geopolitical region reference. | Tech outsourcing hubs in CEE countries. |
| C113 | CFL | Compact Fluorescent Lamp | Energy-efficient lighting device. | Used as an alternative to incandescent bulbs. |
| C114 | CGI | Common Gateway Interface | Protocol for web servers to run external programs. | Used in early dynamic web applications. |
| C115 | CIDR | Classless Inter-Domain Routing | IP addressing method to improve allocation efficiency. | Used in modern IPv4 and IPv6 addressing. |
| C116 | CIM | Computer Integrated Manufacturing | Integration of all manufacturing processes using computers. | Factories using CIM achieve automation. |
| C117 | CIO | Chief Information Officer | Executive managing an organization’s IT strategy. | A CIO oversees company-wide digital transformation. |
| C118 | CLP | Command Line Processor | Interface processing typed user commands. | Used in IBM mainframes for batch operations. |
| C119 | CLS | Critical Load Shedding | Reducing electrical loads during grid stress. | Implemented in smart grid management. |
| C120 | CM | Configuration Management | Process ensuring consistency of product design. | Used in software and aerospace projects. |
| C121 | CML | Continuous Machine Learning | Ongoing training of AI models in real-time. | Used in fraud detection systems. |
| C122 | CMOS | Complementary Metal Oxide Semiconductor | Low-power transistor technology. | Found in camera sensors and microcontrollers. |
| C123 | CMR | Customer Managed Relationship | Customer-driven engagement management system. | Used in digital marketing automation. |
| C124 | CNG | Compressed Natural Gas | Cleaner fuel alternative for vehicles. | City buses operate on CNG. |
| C125 | CNC | Computer Numerical Control | Automated control of machinery via coded instructions. | CNC milling machines in factories. |
| C126 | CNR | Carrier to Noise Ratio | Measure of signal quality in communications. | Used in satellite and RF systems. |
| C127 | COB | Chip On Board | Semiconductor assembly method. | Used in LED modules and compact electronics. |
| C128 | COBIT | Control Objectives for Information and Related Technologies | Framework for IT governance. | Used for IT audit and compliance. |
| C129 | COD | Chemical Oxygen Demand | Measure of water pollution level. | Used in wastewater treatment analysis. |
| C130 | COM | Component Object Model | Microsoft framework for software component interaction. | Used in Windows-based applications. |
| C131 | COP | Coefficient of Performance | Efficiency ratio for heating/cooling devices. | Air conditioners have a COP rating. |
| C132 | CORBA | Common Object Request Broker Architecture | Middleware for communication between applications. | Used in distributed software systems. |
| C133 | COS | Class of Service | Differentiation of data traffic priorities in networking. | Used in enterprise QoS policies. |
| C134 | CPA | Certified Public Accountant | Licensed accounting professional. | Auditors and tax consultants hold CPA certification. |
| C135 | CPC | Cost Per Click | Online advertising pricing model. | Used in Google Ads campaigns. |
| C136 | CPI | Cycles Per Instruction | Performance metric for CPU efficiency. | Lower CPI indicates faster processors. |
| C137 | CPL | Current Programming Language | General-purpose programming language for early systems. | Predecessor to the C language. |
| C138 | CPM | Cost Per Mille | Cost per thousand ad impressions. | Used in digital marketing analytics. |
| C139 | CPUC | California Public Utilities Commission | Regulator for utility services in California. | Oversees energy and telecom infrastructure. |
| C140 | CR | Change Request | Document requesting project modification. | Used in software development lifecycle. |
| C141 | CRC32 | Cyclic Redundancy Check 32-bit | Common 32-bit error detection method. | Used in ZIP and PNG file integrity verification. |
| C142 | CRM | Customer Relationship Management | Software to manage business-customer interactions. | Salesforce is a leading CRM platform. |
| C143 | CRO | Contract Research Organization | Provides outsourced R&D services. | Used by pharmaceutical companies. |
| C144 | CRTD | Certified Radiologic Technologist | Qualified professional in radiologic technology. | Works in diagnostic imaging centers. |
| C145 | CS | Computer Science | Study of computational systems and programming. | Core academic discipline in IT. |
| C146 | CSA | Canadian Standards Association | Organization developing technical standards. | CSA mark on electrical safety equipment. |
| C147 | CSE | Computer Science Engineering | Engineering discipline focusing on computing systems. | Offered as a university degree program. |
| C148 | CSI | Control Systems Integration | Combining different control systems for automation. | Used in industrial robotics. |
| C149 | CSR | Corporate Social Responsibility | Ethical business framework contributing to society. | Tech companies engage in CSR for sustainability. |
| C150 | CSSD | Central Sterile Services Department | Hospital unit for sterilizing instruments. | Ensures infection control in healthcare. |
| C151 | CST | Central Standard Time | Time zone in North America (UTC−6). | Used by states like Texas and Illinois. |
| C152 | CT | Computed Tomography | Imaging method using X-rays for 3D body scans. | Used in medical diagnostics. |
| C153 | CTA | Call To Action | Marketing prompt encouraging user engagement. | “Buy Now” is a common CTA button. |
| C154 | CTC | Cost To Company | Total salary and benefits package. | Used in HR and recruitment offers. |
| C155 | CTI | Computer Telephony Integration | Linking computers and telephones for automation. | Used in call centers for CRM pop-ups. |
| C156 | CTO | Chief Technology Officer | Senior executive responsible for technological innovation. | Oversees R&D and IT direction. |
| C157 | CTR | Click-Through Rate | Ratio of clicks to impressions in ads. | High CTR means better ad engagement. |
| C158 | CTS | Clear To Send | Signal controlling data flow in communication systems. | Used in RS-232 serial communication. |
| C159 | CU | Copper | Chemical element widely used in electrical systems. | Copper wiring in electrical installations. |
| C160 | CUDA | Compute Unified Device Architecture | Parallel computing platform from NVIDIA. | Used in AI and GPU-accelerated computing. |
| C161 | CUI | Common User Interface | Standardized interface for uniform user interaction. | Applied in enterprise applications. |
| C162 | CVE | Common Vulnerabilities and Exposures | Public list of known cybersecurity issues. | Used in security patch management. |
| C163 | CVR | Cockpit Voice Recorder | Device recording pilot communications. | Used in aircraft for investigation. |
| C164 | CWD | Current Working Directory | Directory currently active in command line. | Used in shell scripting. |
| C165 | CWE | Common Weakness Enumeration | Database of software security flaws. | Used by developers for secure coding. |
| C166 | CWS | Cold Water Supply | Plumbing system for cold water. | Used in residential plumbing design. |
| C167 | CX | Customer Experience | Overall perception of brand interaction. | Companies improve CX through digital support. |
| C168 | CYL | Cylinder | Component in engines and compressors. | Used in automotive engines. |
| C169 | CYC | Cycle | Sequence of repeating operations in machinery. | CPU instruction cycle. |
| C170 | CYS | Cysteine | Amino acid essential for protein synthesis. | Used in biotechnology research. |
| C171 | CYT | Cytology | Study of cells. | Used in medical pathology. |
| C172 | CZT | Cadmium Zinc Telluride | Semiconductor material for radiation detectors. | Used in X-ray and gamma-ray sensors. |
| C173 | CDF | Cumulative Distribution Function | Statistical function describing probability distribution. | Used in data analytics. |
| C174 | CFET | Complementary Field-Effect Transistor | Advanced transistor structure for future CPUs. | Used in semiconductor R&D. |
| C175 | CMA | Content Management Application | Tool to create and manage digital content. | WordPress is a CMA system. |
| C176 | CMS | Content Management System | Software to manage website content. | Joomla, Drupal, and WordPress are CMSs. |
| C177 | CMOS-SOS | CMOS on Sapphire | Semiconductor technology for high radiation tolerance. | Used in space-grade electronics. |
| C178 | CPCB | Central Pollution Control Board | Indian government environmental body. | Regulates industrial pollution control. |
| C179 | CPI | Consumer Price Index | Measure of inflation based on consumer goods prices. | Used by governments for economic analysis. |
| C180 | CSRNG | Cryptographically Secure Random Number Generator | Random number generator used in encryption. | Used in SSL/TLS protocols. |
| C181 | CTF | Capture The Flag | Cybersecurity competition for ethical hacking. | Practiced in infosec training. |
| C182 | CI/CD | Continuous Integration/Continuous Deployment | Software DevOps pipeline methodology. | Used in GitHub Actions and Jenkins. |
| C183 | CADR | Clean Air Delivery Rate | Measure of air purifier efficiency. | Used in HEPA air purifiers. |
| C184 | CBM | Condition-Based Maintenance | Maintenance strategy based on real-time data. | Used in predictive maintenance systems. |
| C185 | CEN | European Committee for Standardization | Body responsible for developing European standards. | Defines EN standards for products. |
| C186 | CFR | Code of Federal Regulations | Legal codification of U.S. federal laws. | Used for compliance in industrial sectors. |
| C187 | CLK | Clock | Synchronization signal in digital circuits. | Used in microprocessor design. |
| C188 | CMD | Command | Instruction given to a system or device. | Used in Windows command prompt. |
| C189 | CMSIS | Cortex Microcontroller Software Interface Standard | ARM standard for embedded programming. | Used in STM32 microcontrollers. |
| C190 | CNF | Configuration File | File that defines software or system settings. | .ini or .yaml files used in applications. |
| C191 | COPR | Cooperative Research | Joint R&D between institutions. | Used in academic-industrial partnerships. |
| C192 | CPP | C Plus Plus | High-level programming language. | Used in software development and simulations. |
| C193 | CRC-16 | Cyclic Redundancy Check 16-bit | Error detection using 16-bit polynomial. | Used in Modbus communication. |
| C194 | CRTS | Cathode Ray Tube Screen | Display using electron beams. | Found in vintage monitors. |
| C195 | CST | Cell Site Transceiver | Component in mobile base stations. | Used in telecom towers. |
| C196 | CSU | Channel Service Unit | Digital interface device for WAN connections. | Used in T1 network lines. |
| C197 | CTFP | Certified Technical Financial Professional | Technical certification for finance professionals. | Used in corporate finance and auditing. |
| C198 | CTP | Computer To Plate | Printing technology bypassing film output. | Used in modern offset printing. |
| C199 | CTSO | Certified Technical Safety Officer | Qualified person ensuring industrial safety. | Works in manufacturing and construction sectors. |
| C200 | CVSD | Continuously Variable Slope Delta Modulation | Audio signal encoding technique. | Used in digital voice communication systems. |
