Here is a table showcasing common shortcuts used in each of the mentioned applications:

Windows

ShortcutDescription
Win + DShow/hide the desktop
Alt + TabSwitch between open applications
Ctrl + Shift + EscOpen Task Manager
Alt + F4Close the active window
Ctrl + CCopy selected items
Ctrl + XCut selected items
Ctrl + VPaste copied or cut items
Ctrl + ZUndo the last action
Ctrl + YRedo the last action
Ctrl + ASelect all items

Word (Word Processing)

ShortcutDescription
Ctrl + NCreate a new document
Ctrl + OOpen an existing document
Ctrl + SSave the current document
Ctrl + PPrint the document
Ctrl + ZUndo the last action
Ctrl + YRedo the last action
Ctrl + CCopy selected text
Ctrl + XCut selected text
Ctrl + VPaste copied or cut text
Ctrl + BBold selected text
Ctrl + IItalicize selected text
Ctrl + UUnderline selected text

Excel (Spreadsheet)

ShortcutDescription
Ctrl + NCreate a new workbook
Ctrl + OOpen an existing workbook
Ctrl + SSave the current workbook
Ctrl + PPrint the workbook
Ctrl + ZUndo the last action
Ctrl + YRedo the last action
Ctrl + CCopy selected cells
Ctrl + XCut selected cells
Ctrl + VPaste copied or cut cells
Ctrl + BApply bold formatting to selected cells
Ctrl + IApply italic formatting to selected cells
Ctrl + UApply underline formatting to selected cells
Ctrl + Shift + =Insert a new row or column

PowerPoint (Presentation)

ShortcutDescription
Ctrl + NCreate a new presentation
Ctrl + OOpen an existing presentation
Ctrl + SSave the current presentation
Ctrl + PPrint the presentation
Ctrl + ZUndo the last action
Ctrl + YRedo the last action
Ctrl + CCopy selected items
Ctrl + XCut selected items
Ctrl + VPaste copied or cut items
Ctrl + BApply bold formatting to selected text
Ctrl + IApply italic formatting to selected text
Ctrl + UApply underline formatting to selected text
F5Start the presentation from the beginning

Outlook (Email and Calendar)

ShortcutDescription
Ctrl + NCreate a new email
Ctrl + RReply to the selected email
Ctrl + FForward the selected email
Ctrl + Shift + MCreate a new email message
Ctrl + SSave the draft of the email
Ctrl + EnterSend the email
Ctrl + Shift + ACreate a new appointment
Ctrl + Shift + QCreate a new meeting request
Ctrl + Shift + KAdd a new task
Ctrl + Shift + LCreate a new contact

These shortcuts can help increase productivity and efficiency while using these applications by providing quick access to common functions and actions.