Fixes from Albert Reiner

chapter3.tex

@@ -598,7 +598,7 @@ of the opposite module.
 
 There's more to good interface design than that. Allow me to introduce
 a design element which I call the ``interface component.'' The purpose
-an interface component is to implement, and
+of an interface component is to implement, and
 \emph{hide information about},%
 \index{I!Information-hiding}
 the data interface between two or more other components

chapter5.tex

@@ -1582,7 +1582,7 @@ We've talked about the significance of using names to symbolize ideas
 and objects in the application.  The choosing of names turns out to be
 an important part of the design process.
 
-Newcomers tend to overlook the important of names.  ``After all,''
+Newcomers tend to overlook the importance of names.  ``After all,''
 they think, ``the computer doesn't care what names I choose.''
 
 But good names are essential for readability.  Moreover, the mental

chapter6.tex

@@ -1014,7 +1014,7 @@ In the last section we looked at many techniques for organizing code
 and data to reduce redundancy.
 
 We can also apply limited redundancy during compilation, by letting
-\Forth{} do some of out dirty work.
+\Forth{} do some of our dirty work.
 
 \begin{tip}
 For maximum maintainability, limit redundancy even at compile time.
@@ -1065,7 +1065,7 @@ Naturally we can define:
 (Streets run east and west; avenues run north and south.)
 
 %% I changed "We want" to "we want"
-Now, to define the left margin, we might compute it mentally, We want
+Now, to define the left margin, we might compute it manually. We want
 to center all these boxes on a screen 80 columns wide. To center
 something, we subtract its width from 80 and divide by two to
 determine the left margin. To figure the total width of all the boxes,
@@ -1375,7 +1375,7 @@ part of his toolkit for designing the board, he created a simulator in
 
 \begin{tfquot}
 This morning I realized I've been mixing the descriptions of the chips
-with the placement of the chips on the board. This perfectly
+with the placement of the chips on the board. This is perfectly
 convenient for my purposes at the moment, but when I come up with
 another board that I want to use the same chips for, I have arranged
 things very badly.