Computer Science Degrees

What is a computer science degree?

A computer science degree focuses on the theoretical and practical foundations of computation and its applications. It involves studying well-defined models such as algorithms and protocols to understand and innovate in information processing. This field is considered foundational, enabling advancements in various other disciplines. 

Students in computer science systematically explore methodical processes, including algorithms, to aid in acquiring, representing, processing, storing, communicating, and accessing information. This is achieved by analysing the feasibility, structure, expression, and mechanisation of these processes and their relationship to encoded data in computer memory. 

Computer science degrees often serve as an umbrella term for various specialized and vocational programmes related to computers and technology. While some institutions may use "computer science" interchangeably with "information technology" (IT), many now distinguish between the two. It's essential to review your chosen university's course details to understand the specific focus and scope of their computer science programme.

Top universities for computer science

The QS World University Rankings by Subject 2024: Computer Science and Information Systems includes a ranking of the world’s best computer science schools. The table can be sorted by location or based on the different criteria used to compile the ranking (including academic reputation, employer reputation and research citations). If you intend to receive a computer science degree from one of the best colleges for computer science in the world, exploring this ranking will help you identify top institutions that match your academic and professional goals.

Entry requirements for computer science degrees

Entry requirements for computer science degrees typically vary by university and course. Most institutions require a strong background in mathematics and science for their bachelor of computer science programmes. Prospective students are generally expected to have completed high school courses in calculus, algebra, and sometimes physics or computer science. In the US, a competitive GPA, usually around 3.0 or higher on a 4.0 scale, and standardised test scores like the SAT or ACT are often required. In the UK, students need A-levels in mathematics and sometimes another science or computing subject, with grades usually ranging from A*AA to ABB depending on the institution. Additionally, many universities also require a personal statement and letters of recommendation.  

While prior formal study in computer science is generally not expected, having experience with a programming language like Python or C++ can be beneficial. Some universities even discourage prior programming to prevent the development of "bad" habits. Additionally, interdisciplinary joint courses combining computer science with subjects such as mathematics, engineering, or computing are often available. 

For postgraduate programmes like master's in computer science, applicants typically need to hold a bachelor's degree in computer science or a closely related field, such as mathematics, engineering, or information technology, along with a strong academic record. Some programmes may also ask for professional experience in the field and require GRE scores. Advanced mathematics and proficiency in programming languages remain important, while specific requirements can vary significantly between institutions.

Computer science specialisations

You can expect to begin your computer science degree by developing a foundation in key computer science topics. Some core computer science courses you may cover include; theory of computation, fundamentals of computer science, compliers and operating systems, information theory, basic programming, computer systems and architecture, software development and testing, web applications and databases, algorithms and data structures, and artificial intelligence and machine learning.  

Mathematical concepts you may cover include formal methods, Boolean algebra, discreet mathematics, set theory, probability, statistics, linear algebra, differential equations and calculus. 

You will then choose from an ever-growing range of specialist computer science topics, including advanced internet, advanced programming, artificial intelligence and artificial life, computational logic, computer graphics, computer modelling, computer networks, cybersecurity, computer vision, encryption, ethical hacking, GUIs, game development, human-computer interaction, mobile applications, multimedia computing, networking theory, professional issues and research methods, software engineering and design, web development, quantum computing, blockchain technology, Internet of Things (IoT), augmented reality (AR) and virtual reality (VR), edge computing, and robotics. 

A closer look at some of the most popular computer science topics is provided below.

Programming language theory 

Programming is an interdisciplinary topic, incorporating elements from subjects such as mathematics, software engineering and linguistics. Programming language theory involves looking at the design, implementation, analysis, characterisation and classification of programming languages and their individual features. Your introductory courses will teach you one or more programming languages. Knowledge of more than one will help you to better understand their individual strengths and weaknesses, which will in turn help you to better engage with the challenges addressed by programming language theory. Key topics include syntax, formal semantics (such as natural and structural operational semantics), and abstract machine models. 

Internet of Things (IOT) 

This specialisation involves exploring the integration of everyday objects with internet connectivity to facilitate data collection, exchange, and automation. This field encompasses both hardware and software aspects, focusing on designing IoT devices, developing communication protocols, and ensuring robust security measures. Courses cover topics such as sensor technology, wireless networks, cloud computing for IoT, and data analytics. As IoT applications expand across industries like healthcare, agriculture, and smart cities, professionals in this specialisation are equipped to innovate solutions that enhance efficiency, sustainability, and connectivity in our increasingly interconnected world.  

Cybersecurity 

Cybersecurity specialisation involves protecting digital systems, networks, and data from malicious attacks and unauthorised access. This specialisation addresses critical issues such as threat detection, encryption techniques, secure software development, and network security protocols. Courses typically cover topics such as ethical hacking, digital forensics, risk management, and cybersecurity policies and regulations. With rising cyber threats across industries, cybersecurity professionals are pivotal in safeguarding sensitive information and infrastructure. They play a crucial role in ensuring the security and resilience of digital ecosystems in our interconnected world. 

Artificial intelligence and machine learning 

Artificial intelligence (AI) and machine learning (ML) are pivotal disciplines within modern computer science degrees, focusing on the development, implementation, and optimisation of algorithms that enable machines to learn from and make decisions based on data. Students delve into foundational concepts such as supervised and unsupervised learning, neural networks, and deep learning architectures. Advanced topics often include natural language processing, computer vision, and reinforcement learning. Practical applications span across industries including healthcare, finance, and autonomous systems. Understanding AI and ML principles equips students to tackle complex real-world challenges and innovate in fields where data-driven decision-making and automation are increasingly critical. 

Algorithms and data structures 

Algorithms are systematic procedures used for processing data and automated reasoning, often producing predictable outputs. Data structures, on the other hand, provide methods for efficiently organising and storing data in computer systems, tailored to specific application needs. Together, algorithms and data structures form the foundation of computer science, emphasising efficient data processing and storage methods.  

Students in this specialisation learn essential concepts such as linked lists, sorting algorithms, recursion, trees, hashing, greedy algorithms, graph theory, and techniques for optimising data arrangements. Additionally, they delve into algorithm analysis to determine the computational resources required for executing algorithms effectively. This knowledge equips students to develop and optimise algorithms critical for various computing applications. 

Computer science careers

Choose a computer science degree, and you could be working at the forefront of the next greatest technological innovations. The increasing scope of computer science means you have the choice to work in a wide variety of highly specialised areas. With computer technologies playing an ever-growing role in all aspects of modern life, you’re likely to find your computer science skills in high demand across many different industries although, unsurprisingly, most graduates go into roles within the computer industry. Popular computer science job roles include: 

IT consultant 

As an IT consultant, you collaborate with clients to offer strategic advice on planning, designing, implementing, and optimising information technology systems to align with their business objectives and enhance efficiency. Your role encompasses aspects of systems analysis, design, and application programming, tailored to meet specific client needs. Typical day to day tasks includes assessing client requirements, defining project timelines and resources, analysing existing IT infrastructures, and proposing solutions. You will oversee system implementations, provide detailed reports, and support clients through transitions and training. Additionally, you may engage in sales and business development by identifying new opportunities and maintaining client relationships to foster ongoing partnerships and growth. 

Software engineer or developer 

As a software engineer or developer, you will specialise in designing, developing, and maintaining software applications and systems that cater to diverse technological needs and user requirements. Your role is pivotal in the creation of software solutions across various platforms and domains, ranging from web and mobile applications to enterprise software and embedded systems.  

On a daily basis, you will engage in tasks such as analysing user needs, designing software architectures, writing and debugging code, and testing software to ensure functionality and reliability. Collaboration within multidisciplinary teams is crucial as you integrate user interface (UI) and user experience (UX) design principles, apply agile methodologies for iterative development, and adhere to industry best practices and coding standards. Continuous learning and adaptation to emerging technologies are essential in this fast-evolving field, where innovation drives advancements in automation, artificial intelligence, and cloud computing solutions. 

Systems administrator 

As a systems administrator, you play a vital role in managing and maintaining an organisation's IT infrastructure to ensure smooth and secure operations. Your responsibilities include installing, configuring, and optimising servers, networks, and related hardware and software systems. You monitor system performance, troubleshoot issues, and implement upgrades and patches to keep systems running efficiently and securely.  

Collaboration with IT teams and stakeholders is essential as you oversee data backups, disaster recovery plans, and cybersecurity measures to protect against potential threats. Additionally, you may assist in planning and implementing new technology initiatives, ensuring alignment with business goals and regulatory requirements. Continuous learning is crucial in this dynamic field to stay updated with evolving technologies like cloud computing, virtualisation, and cybersecurity practices, which are increasingly integral to modern IT infrastructures. 

Multimedia programmer 

A multimedia programmer designs and develops multimedia computer products, ensuring they meet design specifications and functional requirements. This role requires a blend of creative and technical skills to incorporate text, sound, graphics, digital photography, 2D/3D modelling, animation, and video into multimedia features. Collaborating closely with designers, you translate design concepts into technical implementations, write efficient code or scripts, and conduct thorough testing to identify and resolve bugs.  

Post-launch, you provide technical support and stay updated on industry trends to suggest and implement improvements. This role spans various platforms such as web, interactive television, kiosks, DVDs, game consoles, and mobile devices, often overlapping with roles like web developer, games developer, or software engineer to achieve project goals effectively. 

More jobs with a computer science degree 

Computer science graduates can pursue diverse career paths beyond the pathways explained above. Opportunities include roles in web development, games development, systems engineering, product management, and AR and VR development. Additionally, positions as analysts (such as business continuity, systems, or technical analysts) and administrators (of databases or networks) offer avenues for specialization. Graduates can also engage in academic or industrial research, contributing to ongoing advancements in computer technology. 

These career paths offer competitive salaries and job prospects across various industries and organisations, including financial institutions, IT firms, management consultancies, software companies, telecommunications providers, data centres, multinational corporations (in IT, finance, and other sectors), government agencies, universities, and healthcare facilities. Additional options include technical writing or roles in management positions, or entrepreneurship, providing ample opportunities for growth and professional development in the dynamic field of computer science.