Information users depend heavily on emails' system as one of the major sources of communication. Its importance and usage are continuously growing despite the evolution of mobile applications, social networks, etc. Emails are used on both the personal and professional levels. They can be considered as official documents in communication among users. Emails' data mining and analysis can be conducted for several purposes such as: Spam detection and classification, subject classification, etc. In this paper, a large set of personal emails is used for the purpose of folder and subject classifications. Algorithms are developed to perform clustering and classification for this large text collection. Classification based on NGram is shown to be the best for such large text collection especially as text is Bi-language (i.e. with English and Arabic content). Ó 2014 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

This article evaluates the accessibility computer laboratories, libraries, and web sites of five different institutions of higher education in Jordan. The evaluation is performed using a questionnaire and by expert visiting these institutions of higher education to check their accessibility according to a set of universal standard collected from the literature. The analysis of the results revealed a serious weakness in understanding, adopting and implementing web accessibility guidelines throughout nearly all evaluated Jordanian universities and colleges. On the other hand, the accessibility of computer laboratories and libraries the questionnaire answers show that there is environmental barrier and technological barrier for persons with disabilities to access such services. The article points out the importance of improving awareness, training staff and developers, and developing formal guidelines to improve the accessibility of universities and colleges services.

This article evaluates the accessibility computer laboratories, libraries, and web sites of five different institutions of higher education in Jordan. The evaluation is performed using a questionnaire and by expert visiting these institutions of higher education to check their accessibility according to a set of universal standard collected from the literature. The analysis of the results revealed a serious weakness in understanding, adopting and implementing web accessibility guidelines throughout nearly all evaluated Jordanian universities and colleges. On the other hand, the accessibility of computer laboratories and libraries the questionnaire answers show that there is environmental barrier and technological barrier for persons with disabilities to access such services. The article points out the importance of improving awareness, training staff and developers, and developing formal guidelines to improve the accessibility of universities and colleges services.