title: What languages are used for real time systems programming?
body: <p>I didn't find any useful information about programming languages for real time systems. All I found was <a href="https://rads.stackoverflow.com/amzn/click/com/0201729881" rel="noreferrer" rel="nofollow noreferrer">Real Time Systems and Programming Languages: Ada 95, Real-Time Java and Real-Time C/POSIX</a> (<a href="http://www.cs.york.ac.uk/rts/books/RTSBookThirdEdition.html" rel="noreferrer">some pdf here</a>), which seems to talk about extensions of Java and C for real times systems (I don't have the book to read). Also, the book was published in 2001, and the information may be obsolete now.</p>
  
  <p>So, I'm dubious whether these languages are used in real world applications, or if real time systems in the real world are made in other languages, like DSLs.</p>
  
  <p>If the second option is true for you, what are the outstanding characteristics of the language you use?</p>