user15049: I am just cleaning up the Event and Site headers in the games in my chess database.
There are a lot of abbreviations there. I am relatively sure about the following:

of, qf, sf and f – octo final, quarter final, semi final and final.
zt and izt  – zonal tournament and interzonal tournament.

But I could need help with these:

tt – Transnational Tournament? Training Tournament?
m (also: mt) – Masters? Match? Men? Memorial?
Tch – Transnational Championship?
It – Invitational Tournament? Italia?

Any hints are appreciated.

user14079: tt in databases means "team tournament" : you can find it for teams events, for instance the French team championship or Olympiads.
I suspect Tch to be similar ("Team championship") but I wouldn't be affirmative.

15049: <p>I am just cleaning up the <code>Event</code> and <code>Site</code> headers in the games in my chess database.</p>
<p>There are a lot of abbreviations there. I am relatively sure about the following:</p>
<ul>
<li><code>of</code>, <code>qf</code>, <code>sf</code> and <code>f</code> – <em>octo final</em>, <em>quarter final</em>, <em>semi final</em> and <em>final</em>.</li>
<li><code>zt</code> and <code>izt</code>  – <em>zonal tournament</em> and <em>interzonal tournament</em>.</li>
</ul>
<p>But I could need help with these:</p>
<ul>
<li><code>tt</code> – <em>Transnational Tournament</em>? <em>Training Tournament</em>?</li>
<li><code>m</code> (also: <code>mt</code>) – <em>Masters</em>? <em>Match</em>? <em>Men</em>? <em>Memorial</em>?</li>
<li><code>Tch</code> – <em>Transnational Championship</em>?</li>
<li><code>It</code> – <em>Invitational Tournament</em>? <em>Italia</em>?</li>
</ul>
<p>Any hints are appreciated.</p>
 14079: <p><strong>tt</strong> in databases means &quot;team tournament&quot; : you can find it for teams events, for instance the French team championship or Olympiads.</p>
<p>I suspect <strong>Tch</strong> to be similar (&quot;Team championship&quot;) but I wouldn't be affirmative.</p>
