Computer Engineering Terminologies Part 2. 300+ Computer Engineering Terminologies Part 2 (From N to Z)

Computer Engineering Terminologies

300+ Computer Engineering Terminologies Part 2 (From N to Z)

Welcome to Part 2 of our Computer Engineering Terminologies series. In the previous part, we explored the foundational computer engineering terms from the earlier alphabets and understood their significance in modern computing and technology.

In this second part, we continue the journey through more advanced and widely used terminologies related to programming, networking, cyber security, databases, cloud computing, artificial intelligence, and digital communication. These terms are essential for students, developers, engineers, and technology enthusiasts who want to strengthen their understanding of computer engineering concepts and technical vocabulary.

Below is a list of Computer Engineering terminologies (from N to Z), suitable for notes, exams, competitive preparation, and academic reference.

N – Computer Engineering Terminologies 

1. Node– Device or point in a network.
2. Network Interface Card (NIC)– Hardware enabling network connectivity.
3. Normalization– Database process to reduce redundancy.
4. Neural Network– AI model inspired by the human brain.
5. Null Pointer– Pointer that does not reference any memory location.
6. Namespace– Container for identifiers to avoid naming conflicts.
7. Natural Language Processing (NLP)– AI field that processes human language.
8. Network Protocol– Rules for communication between network devices.
9. Non-Volatile Memory (NVM)– Memory that retains data without power.
10. js– Runtime environment for executing JavaScript server-side.
11. Network Topology– Physical or logical arrangement of network devices.
12. Noise– Unwanted signal interference in communication systems.
13. Nested Loop– Loop inside another loop in programming.
14. Network Address Translation (NAT)– Mapping private IP addresses to public IPs.
15. NAND Gate– Logic gate performing NOT-AND operation.
16. Normal Mode– Standard operating mode of a device or system.
17. Numeric Data Type– Data type used to store numbers.
18. Network Security– Protection of network resources from unauthorized access.
19. Netiquette– Online etiquette for communication.
20. Namespace Pollution– Conflict caused by using common names in programming.
21. Near Field Communication (NFC)– Short-range wireless communication technology.
22. Node-Based Programming– Visual programming using nodes and connections.
23. Noise Margin– Tolerance of digital signals to interference.
24. Network Latency– Delay in data transmission over a network.
25. Normalized Database– Database structured to eliminate redundancy and ensure integrity. 

O – Computer Engineering Terminologies 

1. Operating System (OS)– Software managing hardware and software resources.
2. Object-Oriented Programming (OOP)– Programming paradigm using objects and classes.
3. Opcode– Portion of instruction specifying the operation to perform.
4. Optical Fiber– Medium transmitting data using light signals.
5. Overclocking– Running hardware at speeds higher than the manufacturer rating.
6. Output Device– Hardware that conveys processed data to the user.
7. Open Source Software– Software with publicly available source code.
8. Overflow Error– Error caused when computation exceeds storage capacity.
9. Overfitting– Machine learning model fitting training data too closely.
10. OpenGL– API for rendering 2D and 3D graphics.
11. Opcode Table– Reference table for machine instructions.
12. Online Transaction Processing (OLTP)– Real-time transaction processing system.
13. Optical Character Recognition (OCR)– Technology to convert images of text into machine-readable text.
14. Overlay Network– Virtual network built on top of another network.
15. Object File– Compiled code not yet linked into an executable.
16. Operating Mode– Configured state in which a system operates.
17. Oscillator– Circuit generating repetitive signals.
18. OpenVPN– Secure virtual private network protocol.
19. One-Time Password (OTP)– Password valid for a single session or transaction.
20. Out-of-Band Management– Remote management of devices through a dedicated channel.
21. Optical Drive– Device that reads/writes optical discs like CDs and DVDs.
22. Orchestration– Automated management of complex systems or services.
23. Object Repository– Centralized storage for reusable objects in testing.
24. Observer Pattern– Software design pattern for event notification.
25. On-Premises– Systems hosted locally rather than in the cloud. 

P – Computer Engineering Terminologies 

1. Packet– Unit of data transmitted over a network.
2. Parallel Processing– Simultaneous execution of multiple processes.
3. Password– Secret key used for authentication.
4. Patch– Software update fixing bugs or vulnerabilities.
5. Peripherals– External devices connected to a computer (e.g., keyboard, printer).
6. Pixel– Smallest unit of a digital image.
7. Pipeline– CPU technique for executing multiple instructions simultaneously in stages.
8. Port– Interface for connecting devices or software communication.
9. Protocol– Set of rules governing data communication.
10. Proxy Server– Server acting as an intermediary between client and server.
11. Public Key Infrastructure (PKI)– System managing encryption keys and digital certificates.
12. Pagination– Dividing content into discrete pages in software or memory management.
13. Payload– Part of transmitted data that contains the actual message.
14. Power Supply Unit (PSU)– Converts electrical power for computer components.
15. Primary Storage– Fast, directly accessible memory (RAM).
16. Program Counter (PC)– CPU register holding the address of the next instruction.
17. Persistent Storage– Storage retaining data after power is turned off.
18. Packet Sniffer– Tool that captures and analyses network traffic.
19. Parallel Port– Interface allowing simultaneous data transfer of multiple bits.
20. Partitioning– Dividing storage or resources into separate sections.
21. Predictive Analytics– Using historical data to predict future trends.
22. Python– High-level programming language widely used in computing and AI.
23. Peer-to-Peer (P2P)– Network architecture where devices share resources directly.
24. Pixel Density– Number of pixels per unit area in a display.
25. Platform– Hardware or software environment on which programs run. 

Q – Computer Engineering Terminologies 

1. Queue– Data structure where elements are processed in FIFO order.
2. Query– Request for data from a database.
3. Quantum Computing– Computing using quantum bits (qubits) for advanced processing.
4. Quick Response (QR) Code– Matrix barcode storing data for scanning.
5. QoS (Quality of Service)– Measurement of network performance.
6. Query Optimizer– Database engine component that optimizes SQL queries.
7. Quicksort– Efficient sorting algorithm.
8. Quota– Limit set on resource usage.
9. Quantum Bit (Qubit)– Basic unit of quantum information.
10. Queue Management– Controlling the order and flow of data or processes.
11. Query Language– Language used to request information from databases.
12. Query Execution Plan– Detailed plan for how a database executes a query.
13. Quadrature Amplitude Modulation (QAM)– Technique for transmitting data in communication systems.
14. Quick Load– Fast loading of software or applications.
15. Queue Length– Number of elements in a queue at a given time.
16. Quality Assurance (QA)– Process ensuring software meets defined standards.
17. Quantum Gate– Basic operation in a quantum circuit.
18. Query Result– Data returned by a database query.
19. Quorum– Minimum number of participants needed for a distributed system operation.
20. Queue Pointer– Indicator pointing to the next element in a queue.
21. Quick Response System– System providing fast feedback or interaction.
22. Query Timeout– Maximum time allowed for a database query to execute.
23. Quantization– Process of mapping input values to discrete levels in signal processing.
24. Queue Scheduler– Component managing execution order of queued processes.
25. Query Logging– Recording database queries for analysis or debugging. 

R – Computer Engineering Terminologies 

1. RAM (Random Access Memory)– Volatile memory used for temporary storage during execution.
2. ROM (Read-Only Memory)– Non-volatile memory storing permanent instructions.
3. Router– Network device directing data packets between networks.
4. Runtime– Period during which a program is executing.
5. Recursion– Programming technique where a function calls itself.
6. Relational Database– Database storing data in tables with relationships.
7. Redundancy– Duplication of data or components to ensure reliability.
8. Root Directory– Top-level directory in a file system.
9. RFID (Radio-Frequency Identification)– Wireless technology for identifying objects.
10. Register– Small, fast storage in CPU for temporary data.
11. Replication– Copying data across multiple storage systems for reliability.
12. RAID (Redundant Array of Independent Disks)– Storage technology combining multiple disks.
13. Real-Time System– System responding immediately to input or events.
14. Remote Access– Accessing a system or network from a distant location.
15. Routing Table– Data structure storing routes for packet forwarding.
16. Raster Graphics– Image represented as a grid of pixels.
17. Rollback– Reverting a system or database to a previous state.
18. Resource Allocation– Assigning system resources to tasks or processes.
19. Reference Counting– Memory management technique tracking object usage.
20. Rootkit– Malicious software hiding its presence on a system.
21. Recursive Function– Function implemented using recursion.
22. Request Handler– Component processing client requests in web systems.
23. Rate Limiting– Controlling the number of requests processed over time.
24. RISC (Reduced Instruction Set Computer)– CPU design using simplified instructions.
25. Regression Testing– Testing to ensure new changes do not break existing functionality. 

S – Computer Engineering Terminologies 

1. Software– Programs and operating information used by a computer.
2. Server– Computer or program providing services to clients on a network.
3. SQL (Structured Query Language)– Language used to manage relational databases.
4. Switch– Network device connecting multiple devices and directing data.
5. Stack– Data structure following LIFO (Last In, First Out) principle.
6. Syntax– Rules defining the structure of a programming language.
7. Synchronization– Coordinating processes or threads to operate correctly.
8. Subnet– Subdivision of an IP network.
9. Session– Period of interaction between a client and server.
10. Script– Set of instructions executed by an interpreter.
11. Semaphore– Variable or abstract data type used to control access to shared resources.
12. Scalability– Ability of a system to handle increasing workloads.
13. SaaS (Software as a Service)– Cloud-based software delivered over the internet.
14. Sensor– Device detecting and responding to physical input.
15. SSL (Secure Sockets Layer)– Protocol for encrypted communication over the internet.
16. Source Code– Human-readable instructions written in a programming language.
17. Snapshot– Copy of system or data at a specific point in time.
18. Stack Overflow– Error occurring when too much memory is used on the call stack.
19. Storage Area Network (SAN)– High-speed network connecting storage devices.
20. System Call– Request made by a program to the operating system.
21. Subnet Mask– Value used to divide IP addresses into network and host portions.
22. Structured Data– Data organized in a defined format.
23. Streaming– Continuous transmission of data, such as video or audio.
24. Supercomputer– Extremely fast computer used for complex computations.
25. Swap Memory– Space on a hard drive used as virtual memory. 

T – Computer Engineering Terminologies 

1. TCP/IP (Transmission Control Protocol/Internet Protocol)– Protocol suite for internet communication.
2. Thread– Smallest unit of execution within a process.
3. Token– Data used for authentication or in networking protocols.
4. Topology– Arrangement of devices in a network.
5. Throughput– Amount of data transmitted successfully over a network.
6. Transaction– Single unit of work in a database or system.
7. Trojan Horse– Malicious software disguised as legitimate.
8. Token Ring– Network protocol using a token-passing scheme.
9. Terabyte (TB)– Storage unit equal to 1024 gigabytes.
10. TLS (Transport Layer Security)– Protocol for secure network communication.
11. Trace Route– Tool to track the path of data packets across a network.
12. Terminal– Device or interface used to interact with a computer system.
13. Type Casting– Converting a variable from one data type to another.
14. Template– Predefined structure used in programming or documents.
15. Topology Discovery– Identifying the structure of a network.
16. Task Scheduling– Allocating CPU time to tasks or processes.
17. Text Editor– Software used to create and edit plain text files.
18. Time Complexity– Measure of execution time of an algorithm.
19. Turing Machine– Abstract model of computation.
20. Token Bucket– Algorithm for controlling network traffic flow.
21. Traceability– Ability to track components or changes in software development.
22. Thin Client– Lightweight computer dependent on a server for processing.
23. Trigger– Database mechanism automatically executing actions.
24. Transport Layer– OSI layer responsible for end-to-end communication.
25. Thread Pool– Collection of pre-initialized threads ready to execute tasks. 

U – Computer Engineering Terminologies 

1. URL (Uniform Resource Locator)– Address identifying resources on the internet.
2. UDP (User Datagram Protocol)– Connectionless protocol for fast network communication.
3. Update– Modifying software to add features or fix bugs.
4. Upgrade– Replacing software or hardware with a newer version.
5. User Interface (UI)– The space through which a user interacts with a system.
6. UUID (Universally Unique Identifier)– Unique identifier for objects or devices.
7. Utility Software– Programs performing system maintenance tasks.
8. Uptime– Time a system is operational without failure.
9. Unicode– Standard encoding system for text from multiple languages.
10. USB (Universal Serial Bus)– Standard for connecting peripherals.
11. User Experience (UX)– Overall experience of a user interacting with a system.
12. Unit Testing– Testing individual components of a program.
13. Uninterruptible Power Supply (UPS)– Backup power system for computers.
14. Uniform Resource Identifier (URI)– Generic identifier of resources on the internet.
15. Usage Metrics– Statistics showing how users interact with software.
16. Undo– Reversing the last action in a program.
17. Upload– Transferring data from a local system to a remote system.
18. User Authentication– Verifying the identity of a user.
19. User Account– Individual profile allowing system access.
20. Ubiquitous Computing– Concept where computing is everywhere seamlessly.
21. URL Redirection– Forwarding one URL to another.
22. User Session– Period a user interacts with a system or application.
23. Unit Conversion– Transforming data from one unit to another.
24. Upgrade Path– Planned sequence of software or hardware updates.
25. Usage Policy– Rules defining how users can interact with a system. 

V – Computer Engineering Terminologies 

1. Virtual Machine (VM)– Software emulation of a physical computer.
2. VPN (Virtual Private Network)– Secure network connection over the internet.
3. Variable– Named storage in programming holding data.
4. Version Control– Managing changes to code or documents.
5. Vector Graphics– Image representation using geometric shapes.
6. Virtual Memory– Memory management technique using disk space as RAM.
7. Virus– Malicious program that spreads across systems.
8. VoIP (Voice over IP)– Technology for voice communication over IP networks.
9. VLAN (Virtual Local Area Network)– Logical partition of a LAN.
10. Volatile Memory– Memory that loses data when power is off.
11. Validation– Ensuring data or input meets required criteria.
12. VHDL (VHSIC Hardware Description Language)– Language for designing digital circuits.
13. Viewport– Visible portion of a graphical display or browser window.
14. Virtualization– Creating virtual versions of hardware or software resources.
15. VFS (Virtual File System)– Abstraction layer for file systems.
16. Video Compression– Reducing file size of video content.
17. Version Number– Identifier for software release version.
18. Vector Processor– CPU designed for vector computations.
19. Verification– Checking software meets specifications.
20. Vulnerability– Weakness in a system that can be exploited.
21. Voice Recognition– Converting spoken words into text or commands.
22. Virtual Network– Network created in software rather than hardware.
23. Visual Programming– Programming using graphical elements instead of text.
24. Volatile Storage– Temporary memory used during computation.
25. Virtual Reality (VR)– Simulated environment experienced through devices. 

W – Computer Engineering Terminologies 

1. WAN (Wide Area Network)– Network spanning large geographical areas.
2. Web Server– Server delivering web content to clients.
3. Wi-Fi– Wireless technology for local area networking.
4. Web Application– Software accessed via a web browser.
5. Word Processor– Software for creating and editing text documents.
6. Workflow– Sequence of processes for completing tasks.
7. Write Back Cache– Memory caching technique delaying writes to main storage.
8. Wireless Sensor Network (WSN)– Network of spatially distributed sensors.
9. Web Browser– Software for accessing and viewing web content.
10. White Hat– Ethical hacker testing security systems.
11. WebSocket– Protocol providing full-duplex communication over TCP.
12. Web API– Interface allowing communication with web services.
13. Webhook– User-defined callback URL for automated notifications.
14. Write Through– Memory caching method where writes go directly to main storage.
15. Wireless Fidelity (Wi-Fi)– Standard for wireless local networking.
16. Windows OS– Microsoft operating system family.
17. WordNet– Lexical database for the English language used in NLP.
18. Web Portal– Website providing centralized access to information.
19. Web Crawler– Bot that indexes web pages for search engines.
20. Wireless Access Point (WAP)– Device connecting wireless clients to a network.
21. Watchdog Timer– Timer that triggers system reset on malfunction.
22. Wildcard– Symbol used to represent one or more characters in searches.
23. Web Hosting– Service providing storage for websites.
24. Web Framework– Software framework for building web applications.
25. WebSocket Connection– Persistent communication channel between client and server. 

X – Computer Engineering Terminologies 

1. XML (Extensible Markup Language)– Format for structured data storage and exchange.
2. XPath– Language for navigating XML documents.
3. XSS (Cross-Site Scripting)– Web security vulnerability allowing code injection.
4. XOR Gate– Digital logic gate performing exclusive OR operation.
5. X86 Architecture– Popular CPU architecture family.
6. Xcode– Apple’s IDE for macOS and iOS development.
7. XDR (External Data Representation)– Standard for data serialization.
8. XFS (Extended File System)– High-performance journaling file system for Linux.
9. XML Schema– Defines structure and constraints of an XML document.
10. XaaS (Anything as a Service)– Broad category of cloud-based services.
11. 509 Certificate– Standard format for public key certificates.
12. Xen Hypervisor– Virtualization platform for running multiple OS on one machine.
13. XModem– File transfer protocol for serial communication.
14. XSLT (Extensible Stylesheet Language Transformations)– Transforming XML documents into other formats.
15. Xterm– Terminal emulator for Unix/Linux systems.
16. XDRAM (Extended DRAM)– High-speed DRAM technology.
17. 25 Protocol– Packet-switched network protocol used in early networks.
18. X86-64– 64-bit extension of x86 CPU architecture.
19. 400 Protocol– Standard for email message handling.
20. XMPP (Extensible Messaging and Presence Protocol)– Protocol for instant messaging.
21. XIP (Execute in Place)– Technique allowing code execution directly from ROM or Flash memory.
22. XILINX– Company producing FPGAs and programmable logic devices.
23. XOR Cipher– Encryption technique using XOR operations.
24. Xilinx Vivado– Software suite for FPGA design.
25. XDR Memory Interface– Interface for high-performance memory devices. 

Y – Computer Engineering Terminologies 

1. Yottabyte (YB)– Extremely large unit of digital storage (1024 zettabytes).
2. YAML (YAML Ain’t Markup Language)– Human-readable data serialization format.
3. Yagi Antenna– Directional antenna used in wireless communications.
4. Yield– Measure of successful manufacturing or computing operations.
5. Yellow Book– Standard for CD-ROM format (ISO 9660).
6. Yottahertz (YHz)– Unit of frequency equal to 10²⁴ Hz.
7. Y-Cache– Cache memory architecture with specific mapping technique.
8. YARN (Yet Another Resource Negotiator)– Resource management layer for Hadoop.
9. Yeoman– Scaffolding tool for web application development.
10. Y-Coordinate– Vertical component in a graphical coordinate system.
11. Y-Cable– Cable splitting a signal to multiple destinations.
12. Yobibyte (YiB)– Binary prefix for data storage (1024^8 bytes).
13. Yield Optimization– Maximizing performance or output in systems or manufacturing.
14. Yottameter (Ym)– SI unit of length (10²⁴ meters).
15. YUV Color Space– Color encoding system used in video processing.
16. Yotta Operations per Second (YOPS)– Extremely high-performance computing metric.
17. Yellow Light Protocol– Network traffic control term in simulation or lab setups.
18. Y2K– Year 2000 problem related to date handling in software.
19. YottaFlops– Measure of computing performance (10²⁴ floating-point operations per second).
20. Yield Strength (Hardware)– Maximum stress components can withstand before failure.
21. Yagi-Uda Array– Type of directional antenna system.
22. YouTube API– Interface for accessing YouTube data programmatically.
23. Yottabit (Yb)– Extremely large digital data unit (10²⁴ bits).
24. Yottajoule (YJ)– Extremely large unit of energy in computing simulations or physics modeling.
25. YottaPixel– Hypothetical extremely high-resolution digital image unit. 

Z – Computer Engineering Terminologies 

1. Zero-Day Vulnerability– Security flaw unknown to software vendors.
2. Zip File– Compressed archive format.
3. Zombie Process– Completed process that still occupies an entry in the process table.
4. Zigbee– Wireless communication protocol for low-power devices.
5. Z-Buffer– Depth buffer used in 3D graphics rendering.
6. Zettabyte (ZB)– Extremely large data unit equal to 1024 exabytes.
7. Zero Padding– Adding zeros to data to match a required size.
8. Zero-Configuration Networking (Zeroconf)– Network configuration method without manual setup.
9. Zone File– DNS file storing domain name mapping to IP addresses.
10. Z-Index– CSS property controlling stacking order of elements.
11. Zener Diode– Semiconductor device allowing current to flow in reverse under certain conditions.
12. Zero-Knowledge Proof– Cryptographic method to prove knowledge without revealing information.
13. Zettahertz (ZHz)– Extremely high frequency unit (10²¹ Hz).
14. Zombie Network– Network of compromised devices controlled remotely.
15. Z-Wave– Wireless communication protocol for home automation.
16. Zero-Trust Security– Security model requiring verification for all network access.
17. Zoning– Dividing storage or network into isolated sections.
18. Zoom Factor– Level of magnification in graphical displays or interfaces.
19. Z80 Microprocessor– Classic 8-bit CPU used in early computing.
20. Zero Latency– Ideal condition where response delay is negligible.
21. Zlib– Software library for data compression.
22. Zone Transfer– DNS operation copying domain data from primary to secondary server.
23. Zero Suppression– Removing unnecessary zeros in digital data or display.
24. Z-Algorithm– String-matching algorithm used in pattern searching.
25. Zettabit (Zb)– Extremely large unit of digital data (10²¹ bits).

Conclusion

Computer Engineering terminologies are the building blocks of technical knowledge in the digital world. From hardware and software to networking, cybersecurity, cloud computing, and artificial intelligence, these terms help explain complex technologies in a clear and standardised way. Understanding these terminologies not only improves technical communication but also enhances problem-solving skills, programming knowledge, and professional expertise.

This terminology collection provides a strong foundation for students, engineers, developers, and technology enthusiasts who wish to expand their understanding of computer engineering and modern computing systems.

Computer Engineering terminologies Part 1

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