Model-view-viewmodel
https://en.wikipedia.org/wiki/Model%E2%80%93view%E2%80%93viewmodel

ViewModel
https://developer.android.com/reference/android/arch/lifecycle/ViewModel

Source-code-ViewModel-and-LiveData-Using-a-ViewModel
https://drive.google.com/uc?export=download&id=1a0qNIBPIvX36Oa0syK8tVn38bA7mzFq_

LiveData-overview
https://developer.android.com/topic/libraries/architecture/livedata

Source-code-ViewModel-and-LiveData-Finish-ViewModel-Changes
https://drive.google.com/uc?export=download&id=1UmXiyzqbcbmqaK5MHNnlKpKQ1xR4m4A4

Hello-World-AndroidX
https://android-developers.googleblog.com/2018/05/hello-world-androidx.html

Source-code-ViewModel-and-LiveData-Exposing-LiveData
https://drive.google.com/uc?export=download&id=17QMAR5RM2sai03DvAlSRqa77aIzyDMRj

Source-code-ViewModel-and-LiveData-Swapping-the-ViewModel
https://drive.google.com/uc?export=download&id=18E5pgea9SgewSpCmdAwYHyFxcHFhZPws

IEEE-754
https://en.wikipedia.org/wiki/IEEE_754

Source-code-ViewModel-and-LiveData-ViewModel-with-Top-10-Downloader
https://drive.google.com/uc?export=download&id=1ia0Rqz2WwqtIWuVja0w7ZoHsfEe55cwr

Source-code-ViewModel-and-LiveData-Implement-ViewModel
https://drive.google.com/uc?export=download&id=1slmHiU7278pwGGsZTVuHyOr97GXPvSu-

ViewModel-Overview
https://developer.android.com/topic/libraries/architecture/viewmodel#the_lifecycle_of_a_viewmodel

Source-code-ViewModel-and-LiveData-Final-Changes
https://drive.google.com/uc?export=download&id=1NighpC9KAodjV8q1qnI_KLMWbS7yroyW

NonNull-LiveData-with-Kotlin-extension
https://proandroiddev.com/nonnull-livedata-with-kotlin-extension-26963ffd0333

Source-code-ViewModel-and-LiveData-App-Testing
https://drive.google.com/uc?export=download&id=1LsAZwrsvb9Y1thVN10Whf5cHOH3_30Ls