C#

Materials
   MaterialID int
   MaterialName nvarchar(20)
   MaterialDescription nvarchar(255)
TestCodes
   TestID int
   TestName nvarchar(20) -- something small enough to easily display in a combobox
   TestDescription nvarchar(255)
Results
   ResultID int
   SampleID int -- Links to the sample you tested
   NumberResult float
   TextResult nvarchar(50)
   ...other fields relating to the test (person who ran test, date, etc.)
Samples
   SampleID int
   SampleCode nvarchar(50) -- depends on the code you or your client give to samples
   MaterialID int -- foreign key to the Materials table
   ...other fields describing the sample or its origin
Tests -- put entries in here when you decide to run a particular test on a particular sample
   SampleID int -- foreign key to the Samples table
   TestID int -- foreign key to the TestCode table

function bool AlreadyFound(string serverThatWasFound)
{
 string[] serverList = GetTheServerList();
 foreach(string server in serverList)
 {
   if (server == serverThatWasFound)
     return true;
 }
 return false;
}

function bool AlreadyFound(string serverThatWasFound)
{
 string[] serverList = GetTheServerList();
 for(int i=0;i<serverList.Length;i++)
 {
   if (servers[i]== serverThatWasFound)
     return true;
 }
 return false;
}