Nice. What is the appropriate talk page to discuss this "asterisk technique" ? Some category pages manually mention the main page above the list. Should I convert such "manual" pages ( Category:Electronics, Category:Mathematics, etc. ) to "asterisk" pages ? I see  Category:Embedded systems is trying to go both ways. And I still don't understand  what does it mean when several items are alphabetized under asterisk ? (such as Category:Calculators). 
 

 ::Categorization#Category_sorting discusses the technique. 

 :(Tip: I've found that in order for a category alphabetization change to take effect, that first, on the article page, delete the category tag (i.e.: [[Category:Example]]), save the page. Then re-add the tag with the desired alphabetization characters (i.e.: [[Category:Example|*Example]]), and save the page again. It's a bug, I think. Also, sometimes it takes a few minutes for these changes to show up on the category page.) 

 :Whether Electronics and Mathematics articles should be changed... I think it makes it easier to locate the main article about the topic. 

 :Regarding Category:Calculators, often contributors want more than one article pushed to the top of a category alphabetization. However, in this example Reverse Polish Notation, to me, seems misplaced. 

 :The link at the top of a category page is put in place by adding the tag, {{catmore}} to the category page, or by typing a paragraph like is done at Category:Embedded systems. Personally I like using both techniques. 

 :