21. Home players were introduced in 1966 that allowed consumers to share tapes between their homes and portable systems . 22. This places it in one of the genre of portable systems distinct from the " pure " Tablet. 23. Regular transport, improper use and even normal wear and tear will sometimes cause portable system components to fail. 24. Additionally, local multiplayer between two and four players is also available via an adhoc connection between PlayStation Portable systems . 25. It's a portable system , " said Scott Silliman, director of Duke University's Center on Law, Ethics and National Security. 26. "Robocalypse " was recognized by the KRI games development conference in Moscow as the best game for portable systems . 27. ISL was designed as a portable system programming language able to produce code for a variety of target machines. 28. The portable system for telemetry applications is a solution which gathers in a portable computer full functionalities and performances. 29. In 2006, is the first game of the series on a portable system , and the first featuring online gaming. 30. Similarly, for portable systems look at Pentium II processors with enough RAM and hard disk space to grow on.