minor typo fixes

Author: Ed Costello

source/about.txt

@@ -74,7 +74,7 @@ manuals are available for offline use:
 
 - :hardlink:`MongoDB Reference Manual <mongodb-reference-info.tar.gz>` (tar.gz)
 
-- :hardlink:`MongoDB CURD Operation Introduction <mongodb-crud-info.tar.gz>` (tar.gz)
+- :hardlink:`MongoDB CRUD Operation Introduction <mongodb-crud-info.tar.gz>` (tar.gz)
 
 .. important:: The ``texinfo`` manuals are experimental. If you find
    an issue with one of these editions, please file an issue in the

source/faq/fundamentals.txt

@@ -44,7 +44,7 @@ database table, and each document has
 one or more fields, which corresponds to a column in a relational
 database table.
 
-Collections have important differences from RD MS tables. Documents in a
+Collections have important differences from RDBMS tables. Documents in a
 single collection may have a unique combination and set of fields.
 Documents need not have identical fields. You can add a field to some
 documents in a collection without adding that field to all documents in