Object Oriented Design courses can help you learn principles like encapsulation, inheritance, and polymorphism, along with design patterns such as Singleton and Factory. You can build skills in creating reusable code, improving software maintainability, and designing systems that are easier to understand and extend. Many courses introduce tools like UML for modeling, as well as programming languages such as Java and Python, which are commonly used to implement object-oriented concepts in real-world applications.

Pearson
Skills you'll gain: Virtual Local Area Network (VLAN), Network Security, Network Troubleshooting, Dynamic Host Configuration Protocol (DHCP), Network Architecture, TCP/IP, Routing Protocols, Network Switches, Network Routing, Open Shortest Path First (OSPF), Wireless Networks, Network Support, Network Routers, Virtual Networking, Ansible, General Networking, Network Infrastructure, Software-Defined Networking, Network Planning And Design, Virtual Private Networks (VPN)
★ 4 (19) · Beginner · Specialization · 1 - 3 Months
University of Minnesota
Skills you'll gain: Spreadsheet Software, Analysis, Systems Design, Solution Design, Systems Analysis, Model Evaluation, Machine Learning Algorithms, Algorithms
★ 4.1 (30) · Mixed · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Javascript, Event-Driven Programming, Web Design and Development, Interactive Design, Web Applications, Interaction Design, Scripting, Web Development, Data Validation
★ 3.9 (28) · Beginner · Guided Project · Less Than 2 Hours

University of London
Skills you'll gain: Network Security, IT Security Architecture, OSI Models, TCP/IP, Threat Modeling, Network Protocols, Computer Networking, Cybersecurity, Application Security, Network Architecture, General Networking, Cryptographic Protocols, Vulnerability Assessments, Network Infrastructure, Exploit development, Network Model, Network Routing, Communication Systems
★ 4.9 (33) · Beginner · Course · 1 - 3 Months

Scrimba
Skills you'll gain: Cascading Style Sheets (CSS), HTML and CSS, Front-End Web Development, Javascript, Responsive Web Design, Maintainability
★ 4.7 (13) · Intermediate · Course · 1 - 4 Weeks

Arizona State University
Skills you'll gain: Empathy, Emotional Intelligence, Active Listening, Empathy & Emotional Intelligence, Compassion, Leadership, Accountability Frameworks, Personal Development, Discussion Facilitation, Recognizing Others, Self-Awareness, Team Collaboration, Visionary, Team Leadership, Decision Making, Non-Verbal Communication, Interpersonal Communications, Communication, Collaboration, Diversity and Inclusion
★ 4.6 (11) · Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Logo Design, Adobe Illustrator, Creativity, Personal Development, Creative Thinking, Brainstorming, Adobe Creative Cloud, Self-Awareness, Courage, Growth Mindedness, Goal Setting, Knowledge of Apple Hardware, Design Software, Optimism, Adobe Photoshop, Overcoming Obstacles, Self-Motivation, Curiosity, Graphic Design, Graphic and Visual Design
★ 4.8 (7) · Beginner · Specialization · 1 - 3 Months

Universitat de Barcelona
Skills you'll gain: Education and Training, Intercultural Competence, Culture, Teaching, Training Programs, Cultural Diversity, Curriculum Planning, Instructional Strategies, Research, Research Methodologies, International Relations, Student-Centred Learning, Surveys, Instructional and Curriculum Design, Pedagogy, Sustainable Development
★ 4.7 (181) · Beginner · Course · 1 - 3 Months

Duke University
Skills you'll gain: Telehealth, Patient Education And Counseling, Medical Telemetry, Teamwork, Patient Communication, Collaboration, Patient Preparation, Clinical Assessment, Vital Signs, Patient Education and Support, Health Technology, Health Assessment, Patient Treatment, Health Care, Health Systems, Telecommunications, Patient Evaluation, Care Management, Health Care Procedure and Regulation, Communication
★ 4.9 (43) · Beginner · Specialization · 1 - 4 Weeks

Northwestern University
Skills you'll gain: Peer Review, Employee Onboarding, Professional Networking, Quick Learning, Organizational Structure, New Hire Orientations, Professional Development, Relationship Building, Rapport Building, Action Oriented, Planning, Professionalism, Adaptability, Personal Development
★ 4.1 (40) · Beginner · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: C++ (Programming Language), Data Structures, File I/O, Data Cleansing, Data Storage, Data Integrity
★ 4.6 (49) · Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Data Structures, Javascript, Object Oriented Programming (OOP)
Intermediate · Course · 1 - 3 Months