Member of the following sites:
I used Linux Academy and Udemy to study for AWS Certification exams. Both the sites had good material to help prepare for the exam. In the end I think having hands on experience does make a huge difference.
I have been a member of Safari Book for many years now. I find it easier to read books online on web or by making use of the app provided by them instead of buying books. The ability to read any title in their collection at any time is an added bonus. I still buy kindle versions of some books that I like to keep in my collection.
I am a Technician Class Amateur Radio Operator. I get my Radio news and events related to ARRL from here.
For those who do not know, ARRL is a non commercial organization of radio amateurs. You can read more about ARRL here.
Here is a link to the Band Plan page, which tells you about the voluntary division of a band to avoid interference between incompatible modes.
You can also find me on these sites
I get some of my images from Unsplash
I try to give credit to the photographers every time I use their images, even though it is not a requirements. It is the least one can do for those who make their images available for free.