Popular brands, products, services and technologies often used:

  Ecommerce
WooCommerce, Magento, Shopify

  Cloud
Amazon Web Services (AWS), Google Cloud Platform, Alibaba / Aliyun Cloud

  Linux
Debian, Ubuntu, Red Hat, Fedora, CentOS

  Microsoft
Windows workstations, Servers, Office

  Databases
Oracle MySQL, Mariadb, MS-SQL

  Servers / Hosting
Apache, Microsoft Windows Server, IIS, Active Directory, Exchange, Zimbra

  Networking / Phone Systems
Cisco, Linksys, Fortinet Fortigate, Sonicwall, Netgear, ShoreTel ShoreGear

  Coding / Web Development
PHP, WordPress, WooCommerce, Magento, Codeigniter, Fuel CMS, Symfony

  Project Management / Service Desk
Jira, FreshWorks / FreshService, Redmine, Trello