Some sequencers even offer very intuitive interfaces, such as allowing you to step-enter notes by clicking the mouse pointer upon a graphical sheet of music manuscript drawn upon the screen. Digital audio recorders do not typically have such features. With digital audio recorders, you pretty much have to be able to play some musical parts. See Algorithmic Composition for more details. Digital audio recorders do not offer such a feature.
Most computers have software programs which turn the computer into a sequencer.
Examples of sequencer software are CakeWalk, Cubase, Logic, Mark of the Unicorn, etc. There are many such programs, as sequencers are perhaps the most often used tools in music production. An example of a very simple sequencer is Windows MultiMedia Player. This software does not have any facility to record MIDI messages, nor edit them.