I am using a iMac G5 PowerPC which is equipped with 512 MB of RAM. I am using this for Designing purpose where I use lots of graphic software. The most frequent one is Adobe Photoshop and Dreamweaver. I had noticed that when I run the terminal and scroll down it works very slow. Some time the system gets slowed that may be due to applications I used, but that must not effect the terminal. How to speed up the system.