sca, stx w 가 약자인거 같은데 무슨 약자인지 알수있을까요?

<input type="hidden" name="uid" value="<?php echo get_uniqid(); ?>">
    <input type="hidden" name="w" value="<?php echo $w ?>">
    <input type="hidden" name="bo_table" value="<?php echo $bo_table ?>">
    
    
    <input type="hidden" name="wr_id" value="<?php echo $wr_id ?>">
    <input type="hidden" name="sca" value="<?php echo $sca ?>">
    <input type="hidden" name="sfl" value="<?php echo $sfl ?>">
    <input type="hidden" name="stx" value="<?php echo $stx ?>">
    <input type="hidden" name="spt" value="<?php echo $spt ?>">
    
    
    <input type="hidden" name="sst" value="<?php echo $sst ?>">
    <input type="hidden" name="sod" value="<?php echo $sod ?>">
    
    
  <input type="hidden" name="page" value="<?php echo $page ?>">

약자인거 같은데 무슨 약자인지 알수있을까요?