Learning about security

This is very useful information: https://en.wikipedia.org/wiki/Computer_security

CS for Kids 9-14

https://csfirst.withgoogle.com/c/cs-first/en/curriculum.html

A developer’s guide to web design for non-designers

A developer’s guide to web design for non-designers

Password Manager

Comparing 3 password manegement approaches: Google Smart Lock, LastPass and KeeWeb

Adobe InDesign

http://garethdavidstudio.com/tutorials/series/beginners_guide_adobe_indesign/#!

Google Search

Google Search Tips and Tricks

iOS App Development

Download Xcode 9
Swift Cheatsheet
Xcode Keyboard Shortcuts
Xcode Installation Issues
iPhone Resolution
App Icon Dimension and Requirements
Apple's Human Interface Guidelines 
A Brief History of Graphics 

Troubleshoot Swift Sdtilib Tool Error 

Other Resources:
Hackintosh

Error Handling
Check Error
Global and Local Variables
iOS 12 Resource List 
Property List  (plist)
UIKit
Foundation
Swift Standard Library