Updating a blog on the iseries
A Midrange computer, or midrange system, is a designation used mainly by IBM for a class of computer systems which fall in between mainframe computers and microcomputers.
The range was developed in 1960s and more generally known at the time as minicomputers (a term obsolete since 1990s).
Memory and disk cab be moved between the partitions dynamically.
It is also very scalable ranging from 1 to 32 CPUs that can service thousands of users.
Popular makers of such computer lines included for example Digital Equipment Corporation (PDP line), Data General, Hewlett-Packard (HP3000 line), and Sun Microsystems.
IBM has made several models of midrange computers over these years: the System/3, System/34, System/32, System/36, System/38, and AS/400, which was recently rebranded to System i.
Long known for reliability, IBMi has added a “continuous availability” feature for those in the community that cannot rely on traditional availability models.There is a subset of i Series known as i5 -- these have very specific hardware definitions.Note that an i Series box is a physically different system from an AS/400 -- new processors, new all kinds of stuff.Since the client-server model was developed in Unix-like operating systems, using this term vaguely implies support of standard—rather than proprietary—protocols and programming interfaces.AS/400 is the base machine ie hardware - it runs an OS called Os/400.