In the computer industry , I believe , a  [Laptop/Tablet/Smartphone(All-in-One) with built-in DVD-RW Player ]  (more)  is a true and a real  ALL-IN-ONE machine .

A  [Laptop/Tablet/Smartphone(All-in-One) with built-in DVD-RW Player ]  is an  ALL-IN-ONE machine in the sense that it combines the capabilities of a Laptop and a Tablet and a  Smartphone into one machine , which makes them multi-functional .  It can serve as a  Laptop , it can serve as a  Tablet and above all it can serve as a Smartphone (can make phone calls and answer phone calls just like a  5G smartphone and do all the  smartphone-related stuff just like a  5G smartphone)

A good example of an  ALL-IN-ONE machine  is this machine . In other words , in one time it can be a  5G Laptop and in another time it can be a 5G Tablet but most of the time , it is  a  5G Smartphone just like any other Android Smartphone , just like any other 5G  Smartphone . It can be a  5G Smartphone in a  LAPTOP mode when it has the physical appearance of a Laptop and it can be a  5G  Smartphone in a TABLET mode when it has the physical appearance of a  Tablet . Meaning , we can make phone calls and answer phone calls , directly from  our  [Laptop/Tablet/Smartphone(All-in-One) with built-in DVD-RW Player ]  machine or  our  ALL-IN-ONE machine   just like a  5G smartphone(in LAPTOP mode , in TABLET mode , in TENT mode , and in   THIS MODE ,  etc., etc.)

The  [ 15.6 inches  Touchscreen  “ foldable 360 degrees “  INTEL-based  Windows 10   5G  Laptop with built-in DVD-RW Player ]  operate like  Mobile phones  and their SIM cards are interchangeable , meaning , we can pull out the SIM card from our 5G smartphone and swapped back and forth with the   [15.6 inches  Touchscreen  “ foldable 360 degrees “  INTEL-based  Windows 10   5G  Laptop with built-in DVD-RW Player ]  to make phone calls either with the 5G smartphone or with the  [15.6 inches  Touchscreen  “ foldable 360 degrees “  INTEL-based  Windows 10   5G  Laptop with built-in DVD-RW Player ] .