Microsoft Corps Office suite of applications, encompassing its popular Word, Excel and PowerPoint programs, will become available to iPad users from Apple Incs app store from Thursday. The expected announcement marks a significant break with Microsofts longstanding Windows strategy now that new Chief Executive Officer Satya Nadella has taken the helm. The software giant has previously been unwilling to compromise its signature PC operating system. At a news conference Thursday, Microsoft executives demonstrated a new touch-first version of Office crafted for the iPad, available for download as a free app this morning, although a subscription is needed to let users create or edit documents.