Books
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BookStack
Cisco
Cisco and Meraki
Code and Data Manipulation
Sublime Text, Excel, etc
Google Workspace
Internet Infrastructure
DNS Web Servers Protocols and Standards
Microsoft 365
Mobile
Smart Phones and Tablets
Peripherals
Printers, scanners, Bluetooth and Network devices
Servers
Windows Server, Mostly
Ubiquiti
Ubiquiti Unifi
Workstations
Desktop, Laptop. That's about it.