Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| PowerShell (Cmdlet) | PowerShell (Alias) | CMD.EXE / COMMAND.COM | Unix shell | Description |
| --- | --- | --- | --- | --- |
| Get-Content | gc, type, cat | type | cat | Get the content of a file |
| Get-Command | gcm | help | help , which | List available commands |
| Get-Help | help, man | help | man | Help on commands |
| Copy-Item | cpi, copy, cp | copy | cp | Copy one or several files / a whole directory tree |
| Move-Item | mi, move, mv | move | mv | Move a file / a directory to a new location |
| Remove-Item | ri, del, erase, rmdir, rd, rm | del , erase , rmdir , rd | rm , rmdir | Delete a file / a directory |
| Rename-Item | rni, ren, mv | ren , rename | mv | Rename a file / a directory |
| Push-Location | pushd | pushd | pushd | Push the current directory onto the stack |
| Set-Location | sl, cd, chdir | cd , chdir | cd | Change the current directory |
| Write-Output | echo, write | echo | echo | Print strings, variables etc. to standard output |
| Select-String | sls | find , findstr | grep | Print lines matching a pattern |
| Set-Variable | sv, set | set | env, export, set, setenv | Set the value of a variable / create a variable |
Question:
If Powershell (alias) is cpi, copy, cp, what are all corresponding descriptions. 
Answer:
Copy one or several files / a whole directory tree