Dear, The main difference is all IoT devices are Cyber-Physical Systems, but CPSs are not necessarily connected to the Internet and thus, not necessarily IoT devices.  

Kindly check this link.

https://www.quora.com/What-is-the-difference-between-Internet-of-Things-IoTs-and-cyber-physical-systems-CPS

CPS is another name of any embedded system that use output of different connected sensor to change the output of a system. If the sensors are distributed and thier data are used to modify the output of other systems or other CPS they are called IoT. Things in IoT may be anything for example a human who can upload data to change the output of other systems. Cyber physical social systems are more near to IoT than CPS. In the end, the differences are hard to be seen.

Dear Walid,

Thank you for raising this important question. Both CPS and IoT are holistic visions for the outlook for computing and communication in tomorrow's world. They come from different research communities, though, and so they have different emphasis. CPS has roots in control, computer science, real-time systems, and sensor networks. IoT has roots in communication networks and wireless communication. This tends to influence the focus of research in conferences that highlight the particular topic. CPS emphasizes hybrids systems and formal verfication of dynamical systems. IoT emphasizes communication protocols. Both also consider issues of privacy and security, among many others.

This description is for the research areas under those names. When one says CPS, it is best to consult Lee and Seshia for origins of the term (due to Helen Gill). IoT is a more general term and I am not aware of a standard reference for it.

Personally, I think it would be very good if the two communities interact more, since the future is likely tobe shaped by work in both.

Kind regards,

Walid.

Both IoT and CPS are referring to the same fact that virtual and physical worlds are getting connected together. CPS is also known in manufacturing and industrial systems, but IoT is more general. 

The following presentation may interest you:

http://www.slideshare.net/ArianRazmiFarooji/the-impacts-of-cyber-physical-systems-on-products

Both IOT and CPS have physical aspect as well as cyber aspect. These may be referred as smart systems. IOT emphasizes on connectivity while CPS emphasizes on embedded part.

Interesting debate. Both IOT and CPS have physical aspect as well as cyber aspect. These may be referred as smart systems. IOT emphasizes on connectivity while CPS emphasizes on embedded part.

Both of them are almost the same.

But if we look at the architecture then we can see a big difference such as IoT need 4 main things sensing, connectivity of things, communication, and computation while CPS need at least 5 things (i.e, sensing, connectivity of things, communicate, compute, and control).

Furthermore, All IoT/CPS-related smart services, no matter how diverse they may be, follow these five basic steps at all times: (1) Sense; (2) Transmit; (3) Store; (4) Analyze; (5) Act

You can reference:

Towards In-Network Generalized Trustworthy Data Collection for Trustworthy Cyber-Physical Systems

https://www.researchgate.net/publication/337023738_Towards_In-Network_Generalized_Trustworthy_Data_Collection_for_Trustworthy_Cyber-Physical_Systems

Hello.

I know that this is already an old question with s many rather good answers. But find this document published by NIST and I think it worth to be add here as a quite objective comparison of existing definitions of CPS and IoT:

https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.1900-202.pdf

They share different feautures, look at the paper attached, recently published: G. Fortino, C. Savaglio, G. Spezzano and M. Zhou, "Internet of Things as System of Systems: A Review of Methodologies, Frameworks, Platforms, and Tools," in IEEE Transactions on Systems, Man, and Cybernetics: Systems, vol. 51, no. 1, pp. 223-236, Jan. 2021, doi: 10.1109/TSMC.2020.3042898

1) According to ISO/IEC JTC1 2015 both terms are exchangeable. For instance, CPS is used more in the USA while in EU IoT is more dominant.

2) All IoT devices are Cyber-Physical Systems. CPSs are not necessarily connected to the Internet and thus, not necessarily IoT devices.

3) IoT is a more popular term with industry, artificial intelligence, and wireless networks people. a subset of CS (mostly verification, software, and systems people) call it CPS.

I think CPS and IoT share the same goals but these goals can't be accomplished with IoT devices. Or we can say IoT is a necessary component of CPS.