Apple は、ユーザが常に最新iOSにバージョンアップするように様々な施策をとり、アプリケーションやコンテンツの提供者も、ユーザに押される形で最新iOSに親和性のあるものを供給するという循環を作っている。この中でiOSの無償提供は重要な施策だがそれをささえている、課税処理、Deferred Revenue について説明する。
The document provides information about digital English language resources from the British Council for adult and teenage learners. It summarizes the British Council's LearnEnglish website which provides free videos, listening activities, games and grammar drills. It also discusses the British Council's mobile applications that provide podcasts, quizzes, games and drills for learners on various mobile devices. Finally, it introduces the IELTS Life Skills test which assesses speaking and listening skills at CEFR levels A1 and B1 as required for some UK visas.
The document provides information about digital English language resources from the British Council for adult and teenage learners. It summarizes the British Council's LearnEnglish website which provides free videos, listening activities, games and grammar drills. It also discusses the British Council's mobile applications that provide podcasts, quizzes, games and drills for learners on various mobile devices. Finally, it introduces the IELTS Life Skills test which assesses speaking and listening skills at CEFR levels A1 and B1 as required for some UK visas.