Abbreviation	Definition
AI	Artificial Intelligence
IIoT	Industrial Internet of Things
CPS	Cyber-Physical System
LLMs	Large Language Models
SCM	Supply Chain Management
PdM	Predictive Maintenance
PLM	Product Lifecycle Management
FL	Federated Learning
Fed-LLM	Federated Large Language Model
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
IoT	Internet of Things
NLP	Natural Language Processing
C2	Computation and Communication
PLCs	Programmable Logic Controllers
Non-IID	Non-Independent and Identically Distributed
PEFT	Parameter-Efficient Fine-Tuning
LoRA	Low-Rank Adaptation
KD	Knowledge Distillation
DP	Differential Privacy
HE	Homomorphic Encryption
SMPC	Secure Multi-Party Computation
AGV	Automated Guided Vehicle
RAG	Retrieval-Augmented Generation