The purpose of the article is to introduce some theoretical issues of digital transformation related to the development of digital libraries and propose measures such as evaluating library users, creating digital collections from endogenous and exogenous sources, upgrading digital infrastructure of the library to enrich digital data sources for university's digital library Research motivation:The article aims to improve the service quality of the library of higher education institutions based on developing the university's digital library system by combining the existing traditional library with the digital library system as well as other databases in the country and abroad under the booming of digitalization and digital transformation.

Waiting lines or queues are common in life, we often encounter a lot of queueing systems to wait for service regarding both crowd-based and random. Indeed, queing system is ubiquitous from customers queueing to pay at the supermarket, customers coming to make transactions at banks or customers waiting for medical examination at the hospital, etc. Queueing theory is the mathematical study of waiting for lines or queues and is one of the most commonly used mathematical tools for the performance evaluation of systems. Applications of queueing theory are increasing in various fields of life for example the banking sector, healthcare, traffic control, and computer science. This paper reviews the contributions and applications of queueing theory in parking lots. Applications of queueing theory in modeling parking lots processes are reviewed and categorized. Research purpose:This paper reviews the contributions and applications of queueing theory in parking lots. Applications of queueing theory in modeling parking lots processes are reviewed and categorized. Our purpose was to identify the leading areas of parking problems as modeled by queueing theory.