Nor division.

Here is a typesetting comparison between Word and LaTeX. Here is some more discussion. Really, I think LaTeX was created by people who are passionate about the 2000 year old art of typography (Roman). For a long time, MS has ignored far too much of that history in the way it typesets. In my experience, I can always tell a Word document from a LaTeX document, even if the fonts are substantially identical. There is something sub-consciously beautiful about proper typesetting.

True story: A math teacher I know once had a student come up to him who claimed his calculator was broken. The teacher took the calculator and entered 4, hit square root and got 2. Entered 25, hit square root and got 5. "Hmmmmm...it seems to work for me" he said. The student then proceeded to take the calculator, enter the number 1, and hit square root repeatedly. "See...the button doesn't work".

Try to do calculus problems without pen and paper. Would Microsoft suggest using MS Word Equation Editor?! Just give me a minute while I swallow my vomit. Ok, I'm fine now.

I'm a LaTeX aficionado. I do quite a reasonable amount of math type-setting. I use LaTeX because the output looks amazing, and because I can use my keyboard alone, instead of having to click on menus and buttons. However, it is still an order of magnitude slower than good old fashioned hand-written problem solving.

The problems at Roscosmos couldn't have anything to do with financial irregularities and misuse of funds, or financial pressures caused by the current economic crisis. Nope. Nothing to see here. Move along.

Yeah well, you probably would have been cynical of SpaceX when their first three launches failed. Now they are on track to dominate the entire industry, even without reusability. Looking at Musk's history, when he says something is possible, you can be quite sure that success is in the set of possible outcomes.

They are the world's cheapest launch service provider and that is without re-usability. They will likely become the dominant launch provider in the world. If they get re-usability to work economically, this will enable mass launches of inexpensive satellites, which could change the entire communications industry. Musk doesn't think small.

The same rockets used for the launch escape will also be used as a propulsive landing system that can land like a helicopter.

Companies like SolarCity basically install solar systems for no money up front, and then lease them back to you for a period. For many houses, even with these fees, the SolarCity systems will save the homeowner quite a bit of money. Licenses to sell power back to the grid are usually restricted, even in states they are allowed. If you have a battery system installed, you will no longer have to sell your excess solar energy back to the grid. You'll simply be able to store it in your battery for later use. Thus, homeowners with these systems may not have to apply for licenses for their solar systems, since they will not be doing net-metering. This will allow many users to install solar panels who couldn't before. It removes the ability for utilities and/or state governments to restrict the number of homes with solar panels. This is why these batteries will likely have a huge impact.

Yeah. Imagine if it happened on final approach.

I remember supporting an office with win95 and Access. I had tech support conversations that almost went like this: