Abstract-Despite the importance of web accessibility in recent years, websites remain partially or completely inaccessible to certain sectors of the population. This is due to several reasons, including web developers' little or no experience in accessibility and the lack of accurate information about the best ways to quickly and easily identify accessibility problems using different Accessibility Evaluation Methods (AEMs). This paper surveys accessibility literature and presents a general overview of the primary challenges of accessibility barriers on websites. In this sense, we critically investigate main challenges forms related to accessibility including standards and guidelines (WCAG 2.0), during website's design and development and during evaluation. Finally, a set of recommendations such as enforcing accessibility legislations are presented to overcome some challenges.

In today's business, knowledge is considered as a core asset in any organization, even it can be considered as important as technological capital. It is part of human abilities and thus human capital. Knowledge management (KM) is becoming a fad in an increasing way so many organizations are trying to apply it in order to enhance their organizational performance. In this paper, literatures were investigated critically in order to show the real influence of knowledge management and some of its practices on organizational performance. It has been founded that KM including knowledge process and infrastructure capabilities affect positively in a huge manner on all aspects of organizational performance directly or indirectly. In the same vein, there is a huge need to continuously train and educate the learning organizations' CEOs about the importance of KM through group works and training programs.

The rapid development and improvement of learning management system (LMS) is driven by the rise of ubiquitous computing. As LMS design shifts from technology-centric to user-centric, developers need to prioritize user experience (UX) to improve their LMS. LMS as part of an e-learning system can benefit from UX research to measure ease of use and user satisfaction. Many academic institutions around the world prefer to use their own customized LMS, such as: B. Moodle is an open source LMS platform built and maintained by most Jordanian universities. Therefore, UX evaluation and measurement is very important for LMS. Several studies have been conducted to analyze and measure LMS products for user feedback. On the other hand, these studies only partially consider LMS products. Instead of observing the quality of LMS, they conducted a study focused on comparing LMS and gaining awareness. The purpose of this study is to collect comments and feedback and evaluate the UX when dealing with LMS. Using Moodle as a case study, this study evaluates the user experience of LMS. Data were collected from 867 participants from various Jordanian institutions using LMS. An online survey was prepared and distributed through various social media groups. This study proposes to use the UX Survey Tool (UEQ) to evaluate and quantify the user experience of LMS. This study aims to get feedback and evaluate and identify the UX while interacting with the LMS. In general, implementing a user experience questionnaire to evaluate and evaluate an LMS provides not only complete user awareness, but also the relative quality level of the LMS. The results provide feedback and support assistance in the implementation of the LMS.

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