ITIC’s 2021 Global Server Hardware, Server OS Reliability Survey delves examines the profound effect COVID-19 has had on the reliability and security of server hardware, server OS and mission critical applications and its impact on customers. To reiterate, the most reliable server distributions: IBM, Lenovo, Huawei, HPE and Cisco successfully maintained the best ever uptime scores they posted in ITIC’s prior reliability studies over the past 20 months.