The Sentiments of JHUNAX

In a multiprogramming and time sharing environment, several users share a system simultaneously. In effect, security problems may arise in this kind of system. A good example are copying or cloning a user's files and by hacking the system. This phenomenon leads to the ineffectiveness and reliability of multiprogramming and time sharing environment. However, exploiting this security problems, let us have first the definition of the two terms used which we are referring this security problems. Multiprogramming is the allocation of a computer system and its resources to more than one concurrent or existing application, job or user. And for time sharing systems or environment is the sharing of a computing resources among many users by means of multiprogramming and multitasking. It was introduced in the 1960's time, and emergence as the prominent model of computing in the 1970's period time. Now, unfolding the first security problem occurred in multiprogramming and time sharin...

Hand-held devices are pocket-sized computing devices, typically having a display screen with touch input and/or miniature keyboard. Hand-held devices have become constructed for use in mobile field management situations to record information in a certain kind of field. They are used to achieve a variety of tasks for increasing efficiency that includes digital notes, sending and receiving invoices, asset management, recording signatures, managing parts and scanning  bar codes . Hand-held computers used at work have  molded  overtime into a variety of form factors, including Smartphones on the low end, hand-held PDA's and Tablet PC's. This widespread existence of hand-held devices is used for many people, including a certain work or job like the doctors as medical practitioners and a supermarket manager. Supermarket managers are responsible for the operation of the unit, all departments, sanitation standards, performance results, expense control and providing direction, mo...