diff --git a/pages/e01-07 b/pages/e01-07
index 5039e39..53d2969 100644
--- a/pages/e01-07
+++ b/pages/e01-07
@@ -17,11 +17,11 @@ sysopen:
         jsr    r0,arg2 / get sys args into u.namep and on stack
         jsr    r0,namei / i-number of file in r1
         br     error2 / file not found
-        tst    (sp) / is mode = 0 (2nd arg of call, 0 means, open for read)
+        tst    (sp) / is mode = 0 (2nd arg of call; 0 means, open for read)
         beq    1f / yes, leave i-number positive
         neg    r1 / open for writing so make i-number negative
 1:
-        jsr    r0,iopen / ooen file whose i-number is in r1
+        jsr    r0,iopen / open file whose i-number is in r1
         tst    (sp)+ / pop the stack and test the mode
         beq    op1 / is open for read op1
 
@@ -44,7 +44,7 @@ op1:
         cmp    r3,$[nfiles*8.] / done scanning
         blt    1b / no, back
         br     error2 / yes, error
-1: / r2 has index to u.fp list, r3, has index to fsp table
+1: / r2 has index to u.fp list; r3, has index to fsp table
         mov    r1,fsp(r3) / put i-number of open file into next available
         mov    cdev,fsp+2(r3) / entry in fsp table, put # of device in
                               / next word
diff --git a/pages/e01-08 b/pages/e01-08
index b1b35bc..41f4e42 100644
--- a/pages/e01-08
+++ b/pages/e01-08
@@ -8,7 +8,7 @@ error2:
 sysret2:
         jmp    sysret / see 'sysret' routine
 
-syscreat: / name, mode
+syscreat: / name; mode
         jsr    r0,arg2 / put file name in u.namep put mode on stack
         jsr    r0,namei / get the i-number
                br  2f / if file doesn't exist 2f
@@ -24,7 +24,7 @@ syscreat: / name, mode
         mov    u.dirbuf,r1 / put i-number for this new file in r1
         br     op0 / open the file
 
-sysmkdir: / make a directopy
+sysmkdir: / make a directory
         jsr    r0,arg2 / point u.namep to the file name
         jsr    r0,namei / get the i-number
                br .+4 / if file not found branch around error
@@ -38,7 +38,7 @@ sysmkdir: / make a directopy
         br     sysret2 /
 
 sysclose: / close the file
-        mov    *u.r0,r1 / move index to u.fu list into r1
+        mov    *u.r0,r1 / move index to u.fp list into r1
         jsr    r0,fclose / close the file
                br error2 / unknown file descriptor
         br     sysret2
@@ -46,8 +46,8 @@ sysclose: / close the file
 sysemt:
         jsr    r0,arg; 30 / put the argument of the sysemt call in loc 30
         cmp    30,$core / was the argument a lower address than core
-        blo    1f / yes, rtssvm
-        cmp    30,$ecore / no, was it higher than  core  and less than
+        blo    1f / yes, rtssym
+        cmp    30,$ecore / no, was it higher than "core" and less than
                          / "ecore"
         blo    2f / yes, sysret2
 1:
diff --git a/pages/e01-09 b/pages/e01-09
index 4bcee35..ca14779 100644
--- a/pages/e01-09
+++ b/pages/e01-09
@@ -26,7 +26,7 @@ sysmdate: / change the modification time of a file
         mov    2(sp),i.mtim+2 / modification time
         br     sysret2
 
-sysstty: / set mode of typewriter, 3 consequtive word arguments
+sysstty: / set mode of typewriter; 3 consequtive word arguments
         jsr    r0,gtty / r1 will have offset to tty block, r2 has source
         mov    r2,-(sp)
         mov    r1,-(sp) / put r1 and r2 on the stack
@@ -43,7 +43,7 @@ sysstty: / set mode of typewriter, 3 consequtive word arguments
         beq    1f / yes, no characters to output
         mov    r1,0f / no, put offset in sleep arg
         jsr    r0,sleep; 0:.. / put tty output process to sleep
-        br     1b / trv to calm it down again
+        br     1b / try to calm it down again
 1:
         mov    (sp)+,r1
         mov    (sp)+,r2 / restore registers
diff --git a/pages/e01-10 b/pages/e01-10
index 34ff917..cb149a4 100644
--- a/pages/e01-10
+++ b/pages/e01-10
@@ -4,7 +4,7 @@
         mov    (r2)+,tty+4(r1) / move to flag byte of tty block
         jmp     sysret2 / return to user
 
-sysgtty: / get status of typewriter, 3 consequtive word arguments
+sysgtty: / get status of typewriter; 3 consequtive word arguments
         jsr    r0,gtty / r1 will have offset to tty block, r2 has
                        / destination
         mov    rcsr(r1),(r2)+ / put reader control status in 1st word