This is a handy app that has many useful topics and quizes that will help you grow your knowledge.
In Industrial Electronics you will learn:
Diodes
Transistors
Amplifiers
FETs
Integrated Circuits
Power supplies
Regulated power supplies
Stablizers
Thyristor
Timers
Ultrasonics
Motors

Some of the topics covered Digital Electronics are:
CMOS CIRCUITS
TTL CIRCUITS
LOGIC CIRCUITS
FLIP-FLOPS
SHIFT RESISTERS
COUNTERS
SEMI CONDUCTOR MEMORIES

Also there are following knowledge enhancements with special contents:
Study Material
MCQ
Fill in the Blanks
True or False

Enjoy the app and gain knowledge!