Posts in category “Rolling Stock”

Legacy Systems

What is a legacy system anyway? Wikipedia offers "a legacy system is an old method, technology, computer system, or application program, 'of, relating to, or being a previous or outdated computer system.' [Merriam Webster]", and notes it is often a perjorative term. For most enterprise IT vendors, a legacy system is one that is older than the one they would quite like you to buy. When UNIX servers were 'the thing', mainframe and AS/400 systems were legacy; when lower cost PC networks became available, UNIX servers & workstations were pictured as legacy; when Internet systems first became available and "three tier' architectures were in vogue, those same PC networks became the latest 'legacy'. For a while, on-premises systems were legacy and the cloud was where things are - until people started to look at what happens when connectivity fails, other considerations such as latency and contention: at the time of writing, hybrid systems look very attractive, but who knows what next year will bring? …more