text: user2711: There's a commonly accepted convention for naming the wells in a 384-well-plate: 
  A01..A24
  B01..B24
  ..
  P01..P24
  
  It's concise and unambiguous and thus very useful.
  For 1536-well plates (32x48) it's more difficult because there's more rows than letters in the alphabet. It seems there's no standard.
  Which nomenclatures are out in the field and which is the best?
  
  user2711: Here's one way I found:
  A01..A48
  ..
  Z01..Z48
  AA01..AA48
  ..
  AF01..AF48
  
  Pros:
  
  Excel does it like that with columns
  it's clear what's the row and what's the column
  
  Cons:
  
  alphabetic sorting of well ids does not what you want
  when reading A01 it's not clear whether the plate size is 384 or 1536
  
  
  user2711: and here's a scheme I made up myself:
  AA01..AA48
  ..
  AZ01..AZ48
  BA01..BA48
  ..
  BF01..BF48
  
  Pros:
  
  alphabetic sorting of well ids does what you expect
  it's clear what's the row and what's the column
  it's easy to distinguish well ids of 384-well plate from those of a 1536-well plate
  
  Cons:
  
  it's not used anywhere AFAIK
  
  
original_text: 2711: <p>There's a commonly accepted convention for naming the wells in a 384-well-plate: </p>
  
  <pre><code>A01..A24
  B01..B24
  ..
  P01..P24
  </code></pre>
  
  <p>It's concise and unambiguous and thus very useful.
  For 1536-well plates (32x48) it's more difficult because there's more rows than letters in the alphabet. It seems there's no standard.
  Which nomenclatures are out in the field and which is the best?</p>
   2711: <p>Here's one way I <a href="http://mscreen.lsi.umich.edu/mscreenwiki/index.php/COORDINATE" rel="nofollow noreferrer">found</a>:</p>
  
  <pre><code>A01..A48
  ..
  Z01..Z48
  AA01..AA48
  ..
  AF01..AF48
  </code></pre>
  
  <p>Pros:</p>
  
  <ul>
  <li>Excel does it like that with columns</li>
  <li>it's clear what's the row and what's the column</li>
  </ul>
  
  <p>Cons:</p>
  
  <ul>
  <li>alphabetic sorting of well ids does not what you want</li>
  <li>when reading A01 it's not clear whether the plate size is 384 or 1536</li>
  </ul>
   2711: <p>and here's a scheme I made up myself:</p>
  
  <pre><code>AA01..AA48
  ..
  AZ01..AZ48
  BA01..BA48
  ..
  BF01..BF48
  </code></pre>
  
  <p>Pros:</p>
  
  <ul>
  <li>alphabetic sorting of well ids does what you expect</li>
  <li>it's clear what's the row and what's the column</li>
  <li>it's easy to distinguish well ids of 384-well plate from those of a 1536-well plate</li>
  </ul>
  
  <p>Cons:</p>
  
  <ul>
  <li>it's not used anywhere AFAIK</li>
  </ul>
  