The goal should be to maintain the positive momentum established on Tuesday throughout the week.. Accountemps, which is a staffing agency, reports that the most productive time of the week for an employee is between 10 a.m. and noon on a Tuesday after a vacation.
Google's Android and Apple's iOS are operating systems used primarily in mobile technology, such as smartphones and tablets. Android, which is Linux-based and partly open source, is more PC-like than iOS, in that its interface and basic features are generally more customizable from top to bottom. However, iOS' uniform design elements are sometimes seen as being more user-friendly.
Cocoa (API) Judging for the closed-ness of Apple, you probably won't get much credible answer from Apple's own people. OS X and iOS are primarily written in Objective-C with some C++ in between (e.g. IOKit, WebKit, etc) and probably some C as well for the kernel stuff. However looking at Apple's software engineering jobs vacancies [1], these are also relevant programming languages at Apple: 1  Java.  Scala.