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.

Suppose there is a long sentence like: This London hit show took America by storm, full of charm, humour and delightful songs that make it a perfect theatrical event for the entire family. And you want to cut it off after an arbitrary specified amount of characters like so: This London hit show took America by storm, full of charm, humour and delightful songs that make... What is the name for the missing text indicated by the three-dot ellipsis?.
an omission or to omit a part of the sentence use an ellipsis Ellipsis (plural ellipses; from the Ancient Greek: , elleipsis, 'omission' or 'falling short') is a series of dots that usually indicates an intentional omission of a word, sentence, or whole section from a text without altering its original meaning. From the Wiki for Ellipsis

I am looking for a word or phrase which can be used in the sentence: It is a rather old, but _________________ technology. The word or phrase should address a technology that is totally investigated, researched in detail, and thoroughly optimised, so there is nothing more to find out or improve.
Most common term I have seen repeatedly and would thus use is, well established. It is rather old, but well-established technology Note as correctly point out by @Chappo below in this case grammar dictates a hyphen is required since it is a compound adjective preceding a noun. 'science can be leading edge or well established' Wiki Technology

Background We have a motivational poster in our office that says: None of us is as smart as all of us. I think that it's grammatically incorrect, and here is my reasoning: All of the tigers have spots. All of us are here. None of us are dead yet. The three examples all sound correct when using the plural 'are', rather than 'is'. Question Unfortunately, some of my coworkers disagree with me. They believe that the quote is correct when it uses the word 'is'. So my question is this: Is the motivational quote grammatically correct or should it say 'all'?.

Semantically, none is neither singular nor plural. It's less than one and much less than many. So its subject agreement is entirely arbitrary. Plus, negatives are noted for their funny grammar. Positive quantifiers are either singular in verb agreement, like each and every, or plural, like all. None can be either, depending on context. Every boy is playing today. Every one of the boys is playing today. Each boy is playing today. Each of the boys is playing today. All of the boys are playing today. None of them are playing today. None of them is armed. If it quantifies a plural noun phrase, as in none of us, then it's equivalent to the negation of a universal quantifier in many cases. For instance, None of us are going to the party. is equivalent to All of us are not going to the party. which is ambiguous; that's one reason not to say it this way. instead of All of us are staying away from the party. which is unequivocally plural. As for the motivational slogan None of us is as smart as all of us (note, no full stop) It's intended to make you think, and it seems to have succeeded. If you like, you can take it as short for None of us is as smart as all of us together are. which is meant to contrast individual intelligence with groupthink, and therefore is unequivocally singular. tl;dr It'd be grammatical with are, but it'd also be a less efficient slogan.