- RedHat
- RHCE Certification
- RHCSA
- Red Hat Certified Specialist in Cloud Infrastructure
- Red Hat Certified Specialist in Containers
- Red Hat Certified Specialist in Cloud-native Integration
- Red Hat Certified Specialist in Enterprise Application Server Administration
- Red Hat Certified Specialist in Ceph Cloud Storage
- Red Hat Certified Specialist in OpenShift AI
- Red Hat Certified OpenShift Administrator
- Red Hat Certified OpenShift Application Developer
- Red Hat Certified Specialist in OpenShift Virtualization
- Red Hat Certified Specialist in Building Resilient Microservices
- Red Hat Certified Specialist in Services Management and Automation
- Red Hat Certified Specialist in OpenShift Data Foundation
- Red Hat Certified Specialist in Developing Automation with Ansible Automation Platform
- Red Hat Certified Cloud-native Developer
- Red Hat Certified Specialist in OpenShift Automation and Integration
- Red Hat Certified Specialist in Deployment and Systems Management
- Red Hat Certified Specialist in Security: Linux
- Red Hat Certified Specialist in Microsoft Windows Automation with Ansible
- Red Hat Certified Specialist in High Availability Clustering
- Red Hat Certified Specialist in Linux Performance Tuning
- Red Hat Certified Specialist in Ansible Network Automation
- Red Hat Certified Specialist in Identity Management
- Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting
- Red Hat Certified Specialist in Event-Driven Development with Kafka
- Riverbed
- RES Software
- Riverstone
- RSA
- Ruby
- Ruijie
- RUCKUS
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