The Collaborative International Dictionary of English v.0.48:

Ado \A*do"\ ([.a]*d[=oo]"), (1) v. inf., (2) n. [OE. at do,
   northern form for to do. Cf. Affair.]
   1. To do; in doing; as, there is nothing ado. "What is here
      ado?" --J. Newton.
      [1913 Webster]

   2. Doing; trouble; difficulty; troublesome business; fuss;
      bustle; as, to make a great ado about trifles.
      [1913 Webster]

            With much ado, he partly kept awake.  --Dryden.
      [1913 Webster]

            Let's follow to see the end of this ado. --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ado
    n 1: a rapid active commotion [syn: bustle, hustle,
         flurry, ado, fuss, stir]

Moby Thesaurus II by Grady Ward, 1.0:

97 Moby Thesaurus words for "ado":
   agitation, annoyance, anxiety, besetment, bother, botheration,
   brawl, broil, brouhaha, burst, bustle, can of worms, commotion,
   confusion, disadvantage, disturbance, donnybrook, donnybrook fair,
   dustup, ebullience, ebullition, eddy, effervescence, effort,
   embroilment, evil, exertion, feery-fary, ferment, fermentation,
   fidgetiness, fit, flap, flurry, fluster, flutter, flutteriness,
   foofaraw, fracas, free-for-all, fume, furore, fuss, fussiness,
   great ado, hassle, headache, helter-skelter, hubbub, hullabaloo,
   hurly-burly, hurry, hurry-scurry, inconvenience, maelstrom, matter,
   melee, pains, peck of troubles, pell-mell, perturbation, pother,
   problem, racket, rampage, restlessness, riot, rough-and-tumble,
   roughhouse, row, ruckus, ruction, ruffle, rumpus, scramble,
   sea of troubles, shindy, spasm, spurt, stew, stir, sweat, swirl,
   swirling, to-do, trouble, tumult, turbulence, turmoil, unquiet,
   uproar, vortex, whirl, whirlpool, whirlwind, worry, yeastiness



V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

ADO
       ActiveX Data Objects (ASP, ODBC, MS, IIS)


The Free On-line Dictionary of Computing (30 December 2018):

ActiveX Data Objects
ADO

    (ADO) Microsoft's
   library for accessing data sources through OLE DB.
   Typically it is used to query or modify data stored in a
   relational database.

   Home

(http://msdn.microsoft.com/library/en-us/ado270/htm/adostartpage1.asp).

   (2003-07-08)