I actually prefer the voice-activated menus and am glad that the power company has one -- since I am a rotary-dial telephone junkie, and further have a lot of dang Touchtone Trimline phones where you can't see the buttons without taking it off your ear.
So, uh, TouchTone? There are some cool things that can be done with it, like voicemail, but a lot of people just use it to make you navigate an annoying menu [1]. I guess we can call it a computer technology, since you generally have a digital system on the other end when there's a menu. Pushbutton pulse is just as convenient for dialing.
Second choice, definitely Zip disks[2]. They're expensive, obsolete, and unreliable. A lot of people I know still use them -- thankfully, I got all mine over to CD-R and hard disk a while back. This might rank above TouchTone.
Third choice, TN3270. Anyone who spends any time around academic institutions knows about this insecure beast, and bankers probably still have to put up with it too. Sensitive records from the mainframe thrown around by a Telnet client emulating an obsolete non-standard [3] dumb terminal are NOT secure.
1. Note that on many systems, you get a receptionist if you hold. This is for if you are confused or are using an old telephone.
2. Jazz, also. Just as bad, especially in the DVD-R and cheap LaCie drive era.
3. IBM terminals are a lot different from the DEC terminals usually emulated for regular telnet and stuff like that.
