I want to know the answer to the following question:
During which entire century were companies and nations trying to achieve true HDTV?
All the background I'm provided with is that "The term high definition once described a series of television systems originating from August 1936; however, these systems were only high definition when compared to earlier systems that were based on mechanical systems with as few as 30 lines of resolution.". Is that enough to answer the question?
Answer: no