[TUHS] The most surprising Unix programs
usotsuki at buric.co
Wed Mar 18 01:40:52 AEST 2020
On Tue, 17 Mar 2020, ca6c at firemail.cc wrote:
> Doug McIlroy wrote:
>> The math library for Bob Morris's variable-precision desk calculator
>> used backward error analysis to determine the precision necessary at
>> each step to attain the user-specified precision of the result. In
>> my software-components talk at the 1968 NATO conference on software
>> engineering, I posited measurement-standard routines, which could deliver
>> results of any desired precision, but did not know how to design one. dc
>> still has the only such routines I know of.
> dc, along with ed and I guess awk if we can put it here, is one of my
> favorite Unix programs that I use daily. I don't even have a "normal"
> calculator installed. It just smells like Unix.
> There is something sexy about reverse Polish notation. I really do
> encourage everyone reading this to try dc as their "desk calculator"
> for some time.
I personally prefer bc.
Actually, I use GNU's bc on Windows and MS-DOS too. (Unfortunately the
traditional version wouldn't work on MS-DOS where it's just a filter to
More information about the TUHS