Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

I am writing a resume. I want to specify that I started my education in 2009 and as of now I am at the 4th grade (in other words, still learning), so how should I specify that in resume: 2009 - present 2009 till now Any suggestions?.
On resumes, the most common way to indicate that a period is ongoing is either 2009 present or 2009 to present The en dash is the preferred punctuation. Many word processors replace a double hyphen with an en dash once the next word is typed.

This very well may just be outside our lexicon at the moment, due to the fact that space travel is extremely limited, but I am looking for the proper terminology to refer to a space vessel that had been rendered a wreck or a derelict, and was repaired and refitted into a workable vessel. In naval terms, a sunk vessel would be refloated, but that term is awkward to use in space. Something like reatmosphered fits the context, but it is awkward and not in the lexicon (though its form makes its intent clear, and could be readily used). Any ideas?.
Consider recommission, which is defined (somewhat obviously) by oxforddictionaries.com as 'commission again'. This sense of 'commission', in turn, is defined by oxforddictionaries.com as Bring (something newly produced) into working condition

Coming from a technical background I'm slightly confused. What is the difference between simultaneously and concurrently? How do we use these words?.

I just looked these up in an online dictionary; this is what I found: concurrently: overlapping in duration simultaneously: at the same instant Both of them mean 'at the same time,' and are almost interchangeable. That said, if I had to point out a slight difference, I'd say that concurrently occurs over a longer time, and is a bit less synchronized than simultaneously. For example: The two processors were running concurrently, then they crashed simultaneously. In that example, I wouldn't swap the two words in question.