diff --git a/sbin/ping/ping.c b/sbin/ping/ping.c
index dd43634f9661..b8545d8e0eee 100644
--- a/sbin/ping/ping.c
+++ b/sbin/ping/ping.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ping.c,v 1.118 2021/06/11 18:47:56 rillig Exp $	*/
+/*	$NetBSD: ping.c,v 1.119 2022/04/07 19:33:37 andvar Exp $	*/
 
 /*
  * Copyright (c) 1989, 1993
@@ -58,7 +58,7 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
-__RCSID("$NetBSD: ping.c,v 1.118 2021/06/11 18:47:56 rillig Exp $");
+__RCSID("$NetBSD: ping.c,v 1.119 2022/04/07 19:33:37 andvar Exp $");
 #endif
 
 #include <stdio.h>
@@ -874,7 +874,7 @@ jiggle(int delta)
 	jiggle_cnt += delta;
 
 	/* flush the FLOOD dots when things are quiet
-	 * or occassionally to make the cursor jiggle.
+	 * or occasionally to make the cursor jiggle.
 	 */
 	dt = diffsec(&last_tx, &jiggle_time);
 	if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0))
diff --git a/sbin/routed/main.c b/sbin/routed/main.c
index 02c4c455a71b..f54d6a0ffc7d 100644
--- a/sbin/routed/main.c
+++ b/sbin/routed/main.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: main.c,v 1.42 2017/10/02 11:02:19 maya Exp $	*/
+/*	$NetBSD: main.c,v 1.43 2022/04/07 19:33:37 andvar Exp $	*/
 
 /*
  * Copyright (c) 1983, 1988, 1993
@@ -45,7 +45,7 @@
 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\
  The Regents of the University of California.  All rights reserved.");
 #ifdef __NetBSD__
-__RCSID("$NetBSD: main.c,v 1.42 2017/10/02 11:02:19 maya Exp $");
+__RCSID("$NetBSD: main.c,v 1.43 2022/04/07 19:33:37 andvar Exp $");
 #elif defined(__FreeBSD__)
 __RCSID("$FreeBSD$");
 #else
@@ -402,7 +402,7 @@ usage:
 			continue;
 		}
 
-		/* Check the kernel table occassionally for mysteriously
+		/* Check the kernel table occasionally for mysteriously
 		 * evaporated routes
 		 */
 		timevalsub(&t2, &flush_kern_timer, &now);
diff --git a/sys/arch/amiga/dev/siop.c b/sys/arch/amiga/dev/siop.c
index bb8e4ea8ffce..e7726abbd971 100644
--- a/sys/arch/amiga/dev/siop.c
+++ b/sys/arch/amiga/dev/siop.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: siop.c,v 1.70 2019/11/10 21:16:22 chs Exp $ */
+/*	$NetBSD: siop.c,v 1.71 2022/04/07 19:33:37 andvar Exp $ */
 
 /*
  * Copyright (c) 1990 The Regents of the University of California.
@@ -70,7 +70,7 @@
 #include "opt_ddb.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: siop.c,v 1.70 2019/11/10 21:16:22 chs Exp $");
+__KERNEL_RCSID(0, "$NetBSD: siop.c,v 1.71 2022/04/07 19:33:37 andvar Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -780,7 +780,7 @@ siop_start(struct siop_softc *sc, int target, int lun, u_char *cbuf, int clen,
 	/*
 	 * Negotiate wide is the initial negotiation state;  since the 53c710
 	 * doesn't do wide transfers, just begin the synchronous transfer
-	 * negotation here.
+	 * negotiation here.
 	 */
 	if (sc->sc_sync[target].state == NEG_WIDE) {
 		if (siop_inhibit_sync[target]) {
diff --git a/sys/arch/amiga/dev/siopvar.h b/sys/arch/amiga/dev/siopvar.h
index bfea7332a589..894738a6dbf5 100644
--- a/sys/arch/amiga/dev/siopvar.h
+++ b/sys/arch/amiga/dev/siopvar.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: siopvar.h,v 1.28 2022/01/01 21:07:13 andvar Exp $	*/
+/*	$NetBSD: siopvar.h,v 1.29 2022/04/07 19:33:37 andvar Exp $	*/
 
 /*
  * Copyright (c) 1990 The Regents of the University of California.
@@ -183,10 +183,10 @@ struct	siop_softc {
 
 /* negotiation states */
 #define NEG_WIDE	0	/* Negotiate wide transfers */
-#define	NEG_WAITW	1	/* Waiting for wide negotation response */
+#define	NEG_WAITW	1	/* Waiting for wide negotiation response */
 #define NEG_SYNC	2	/* Negotiate synch transfers */
 #define	NEG_WAITS	3	/* Waiting for synch negoation response */
-#define NEG_DONE	4	/* Wide and/or sync negotation done */
+#define NEG_DONE	4	/* Wide and/or sync negotiation done */
 
 #define	MSG_CMD_COMPLETE	0x00
 #define MSG_EXT_MESSAGE		0x01
diff --git a/sys/arch/atari/dev/ncr5380.c b/sys/arch/atari/dev/ncr5380.c
index cf1232c09cf6..42c982a11241 100644
--- a/sys/arch/atari/dev/ncr5380.c
+++ b/sys/arch/atari/dev/ncr5380.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ncr5380.c,v 1.76 2021/08/07 16:18:46 thorpej Exp $	*/
+/*	$NetBSD: ncr5380.c,v 1.77 2022/04/07 19:33:37 andvar Exp $	*/
 
 /*
  * Copyright (c) 1995 Leo Weppelman.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ncr5380.c,v 1.76 2021/08/07 16:18:46 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ncr5380.c,v 1.77 2022/04/07 19:33:37 andvar Exp $");
 
 /*
  * Bit mask of targets you want debugging to be shown
@@ -1842,7 +1842,7 @@ scsi_dmaok(SC_REQ *reqp)
 	}
 
 	/*
-	 * LWP: I think that this restriction is not strictly nessecary.
+	 * LWP: I think that this restriction is not strictly necessary.
 	 */
 	if ((req_len & 0x1) || ((u_int)req_addr & 0x3))
 		return 0;
diff --git a/sys/arch/mac68k/dev/ncr5380.c b/sys/arch/mac68k/dev/ncr5380.c
index 9a54703a4ff5..d1a355b31b9d 100644
--- a/sys/arch/mac68k/dev/ncr5380.c
+++ b/sys/arch/mac68k/dev/ncr5380.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ncr5380.c,v 1.70 2021/08/07 16:18:57 thorpej Exp $	*/
+/*	$NetBSD: ncr5380.c,v 1.71 2022/04/07 19:33:37 andvar Exp $	*/
 
 /*
  * Copyright (c) 1995 Leo Weppelman.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ncr5380.c,v 1.70 2021/08/07 16:18:57 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ncr5380.c,v 1.71 2022/04/07 19:33:37 andvar Exp $");
 
 /*
  * Bit mask of targets you want debugging to be shown
@@ -1785,7 +1785,7 @@ scsi_dmaok(SC_REQ *reqp)
 		return (0);
 
 	/*
-	 * LWP: I think that this restriction is not strictly nessecary.
+	 * LWP: I think that this restriction is not strictly necessary.
 	 */
 	if ((req_len & 0x1) || ((u_int)req_addr & 0x3))
 		return (0);
diff --git a/sys/arch/shark/isa/clock.c b/sys/arch/shark/isa/clock.c
index 8b6cd0442b1b..88f4cd03b4e0 100644
--- a/sys/arch/shark/isa/clock.c
+++ b/sys/arch/shark/isa/clock.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: clock.c,v 1.18 2018/09/03 16:29:27 riastradh Exp $	*/
+/*	$NetBSD: clock.c,v 1.19 2022/04/07 19:33:37 andvar Exp $	*/
 
 /*
  * Copyright 1997
@@ -154,7 +154,7 @@ WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.18 2018/09/03 16:29:27 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.19 2022/04/07 19:33:37 andvar Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -399,7 +399,7 @@ gettick(void)
 /* modifications from i386 to shark isa version:
    - removed hardcoded "n -=" values that approximated the time to
      calculate delay ticks
-   - made the time to calculate delay ticks almost negligable. 4 multiplies
+   - made the time to calculate delay ticks almost negligible. 4 multiplies
      = maximum of 12 cycles = 75ns on a slow SA-110, plus a bunch of shifts;
      as opposed to 4 multiplies plus a bunch of divides.
    - removed i386 assembly language hack
diff --git a/sys/dev/hdaudio/hdaudio.c b/sys/dev/hdaudio/hdaudio.c
index 136dd73a4648..4f5f88a8a833 100644
--- a/sys/dev/hdaudio/hdaudio.c
+++ b/sys/dev/hdaudio/hdaudio.c
@@ -1,4 +1,4 @@
-/* $NetBSD: hdaudio.c,v 1.17 2022/03/28 12:33:21 riastradh Exp $ */
+/* $NetBSD: hdaudio.c,v 1.18 2022/04/07 19:33:37 andvar Exp $ */
 
 /*
  * Copyright (c) 2009 Precedence Technologies Ltd <support@precedence.co.uk>
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: hdaudio.c,v 1.17 2022/03/28 12:33:21 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: hdaudio.c,v 1.18 2022/04/07 19:33:37 andvar Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -1079,7 +1079,7 @@ hdaudio_stream_disestablish(struct hdaudio_stream *st)
 }
 
 /*
- * Convert most of audio_params_t to stream fmt descriptor; noticably missing
+ * Convert most of audio_params_t to stream fmt descriptor; noticeably missing
  * is the # channels bits, as this is encoded differently in codec and
  * stream descriptors.
  *
diff --git a/sys/dev/ic/aic79xx.c b/sys/dev/ic/aic79xx.c
index 654e20b2ea35..f695daf5afb2 100644
--- a/sys/dev/ic/aic79xx.c
+++ b/sys/dev/ic/aic79xx.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: aic79xx.c,v 1.64 2022/03/08 20:45:56 andvar Exp $	*/
+/*	$NetBSD: aic79xx.c,v 1.65 2022/04/07 19:33:37 andvar Exp $	*/
 
 /*
  * Core routines and tables shareable across OS platforms.
@@ -49,7 +49,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: aic79xx.c,v 1.64 2022/03/08 20:45:56 andvar Exp $");
+__KERNEL_RCSID(0, "$NetBSD: aic79xx.c,v 1.65 2022/04/07 19:33:37 andvar Exp $");
 
 #include <dev/ic/aic79xx_osm.h>
 #include <dev/ic/aic79xx_inline.h>
@@ -2579,7 +2579,7 @@ ahd_clear_critical_section(struct ahd_softc *ahd)
 		ahd_outb(ahd, SEQCTL0, ahd_inb(ahd, SEQCTL0) & ~STEP);
 		ahd_outb(ahd, SIMODE1, simode1);
 		/*
-		 * SCSIINT seems to glitch occassionally when
+		 * SCSIINT seems to glitch occasionally when
 		 * the interrupt masks are restored.  Clear SCSIINT
 		 * one more time so that only persistent errors
 		 * are seen as a real interrupt.
diff --git a/sys/dev/mscp/mscp_subr.c b/sys/dev/mscp/mscp_subr.c
index 526f49ca3ff6..70218c7d8df7 100644
--- a/sys/dev/mscp/mscp_subr.c
+++ b/sys/dev/mscp/mscp_subr.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: mscp_subr.c,v 1.47 2017/06/01 02:45:10 chs Exp $	*/
+/*	$NetBSD: mscp_subr.c,v 1.48 2022/04/07 19:33:38 andvar Exp $	*/
 /*
  * Copyright (c) 1988 Regents of the University of California.
  * All rights reserved.
@@ -75,7 +75,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: mscp_subr.c,v 1.47 2017/06/01 02:45:10 chs Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mscp_subr.c,v 1.48 2022/04/07 19:33:38 andvar Exp $");
 
 #include <sys/param.h>
 #include <sys/device.h>
@@ -326,7 +326,7 @@ mscp_attach(device_t parent, device_t self, void *aux)
 				/*
 				 * The drive is not spun up.  Use it anyway.
 				 *
-				 * N.B.: this seems to be a common occurrance
+				 * N.B.: this seems to be a common occurrence
 				 * after a power failure.  The first attempt
 				 * to bring it on line seems to spin it up
 				 * (and thus takes several minutes).  Perhaps
diff --git a/sys/dev/pci/if_bge.c b/sys/dev/pci/if_bge.c
index dc2a0797ee0f..78ebb6f37349 100644
--- a/sys/dev/pci/if_bge.c
+++ b/sys/dev/pci/if_bge.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: if_bge.c,v 1.351 2022/01/22 19:01:56 martin Exp $	*/
+/*	$NetBSD: if_bge.c,v 1.352 2022/04/07 19:33:38 andvar Exp $	*/
 
 /*
  * Copyright (c) 2001 Wind River Systems
@@ -79,7 +79,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.351 2022/01/22 19:01:56 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_bge.c,v 1.352 2022/04/07 19:33:38 andvar Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -1257,7 +1257,7 @@ bge_set_thresh(struct ifnet *ifp, int lvl)
 	/* For now, just save the new Rx-intr thresholds and record
 	 * that a threshold update is pending.  Updating the hardware
 	 * registers here (even at splhigh()) is observed to
-	 * occasionaly cause glitches where Rx-interrupts are not
+	 * occasionally cause glitches where Rx-interrupts are not
 	 * honoured for up to 10 seconds. jonathan@NetBSD.org, 2003-04-05
 	 */
 	s = splnet();
diff --git a/sys/kern/kern_proc.c b/sys/kern/kern_proc.c
index 669d33c19f8c..ee83cc87192e 100644
--- a/sys/kern/kern_proc.c
+++ b/sys/kern/kern_proc.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: kern_proc.c,v 1.265 2022/03/13 17:21:29 riastradh Exp $	*/
+/*	$NetBSD: kern_proc.c,v 1.266 2022/04/07 19:33:38 andvar Exp $	*/
 
 /*-
  * Copyright (c) 1999, 2006, 2007, 2008, 2020 The NetBSD Foundation, Inc.
@@ -62,7 +62,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_proc.c,v 1.265 2022/03/13 17:21:29 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_proc.c,v 1.266 2022/04/07 19:33:38 andvar Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_kstack.h"
@@ -2153,8 +2153,9 @@ sysctl_doeproc(SYSCTLFN_ARGS)
 		/*
 		 * Hande all the operations in one switch on the cost of
 		 * algorithm complexity is on purpose. The win splitting this
-		 * function into several similar copies makes maintenance burden
-		 * burden, code grow and boost is neglible in practical systems.
+		 * function into several similar copies makes maintenance
+		 * burden, code grow and boost is negligible in practical
+		 * systems.
 		 */
 		switch (op) {
 		case KERN_PROC_PID:
diff --git a/sys/netinet/sctp_indata.c b/sys/netinet/sctp_indata.c
index 09b6345bb639..6f2ce5bf9a0a 100644
--- a/sys/netinet/sctp_indata.c
+++ b/sys/netinet/sctp_indata.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: sctp_indata.c,v 1.8 2018/12/22 13:11:38 maxv Exp $ */
+/*	$NetBSD: sctp_indata.c,v 1.9 2022/04/07 19:33:38 andvar Exp $ */
 /*	$KAME: sctp_indata.c,v 1.36 2005/03/06 16:04:17 itojun Exp $	*/
 
 /*
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sctp_indata.c,v 1.8 2018/12/22 13:11:38 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sctp_indata.c,v 1.9 2022/04/07 19:33:38 andvar Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_ipsec.h"
@@ -4503,7 +4503,7 @@ sctp_handle_forward_tsn(struct sctp_tcb *stcb,
 	if (cumack_set_flag) {
 		/*
 		 * fwd-tsn went outside my gap array - not a
-		 * common occurance. Do the same thing we
+		 * common occurrence. Do the same thing we
 		 * do when a cookie-echo arrives.
 		 */
 		asoc->highest_tsn_inside_map =  new_cum_tsn - 1;
diff --git a/sys/sys/audioio.h b/sys/sys/audioio.h
index b70dee3f5c5b..f183023359fe 100644
--- a/sys/sys/audioio.h
+++ b/sys/sys/audioio.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: audioio.h,v 1.39 2021/08/21 11:55:25 andvar Exp $	*/
+/*	$NetBSD: audioio.h,v 1.40 2022/04/07 19:33:38 andvar Exp $	*/
 
 /*
  * Copyright (c) 1991-1993 Regents of the University of California.
@@ -62,7 +62,7 @@ struct audio_prinfo {
 	u_int	samples;	/* number of samples */
 	u_int	eof;		/* End Of File (zero-size writes) counter */
 	u_char	pause;		/* non-zero if paused, zero to resume */
-	u_char	error;		/* non-zero if underflow/overflow ocurred */
+	u_char	error;		/* non-zero if underflow/overflow occurred */
 	u_char	waiting;	/* non-zero if another process hangs in open */
 	u_char	balance;	/* stereo channel balance */
 	u_char	cspare[2];
diff --git a/usr.bin/error/subr.c b/usr.bin/error/subr.c
index b1d45b920715..43199acfc797 100644
--- a/usr.bin/error/subr.c
+++ b/usr.bin/error/subr.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: subr.c,v 1.19 2009/08/13 06:59:37 dholland Exp $	*/
+/*	$NetBSD: subr.c,v 1.20 2022/04/07 19:33:38 andvar Exp $	*/
 
 /*
  * Copyright (c) 1980, 1993
@@ -34,7 +34,7 @@
 #if 0
 static char sccsid[] = "@(#)subr.c	8.1 (Berkeley) 6/6/93";
 #endif
-__RCSID("$NetBSD: subr.c,v 1.19 2009/08/13 06:59:37 dholland Exp $");
+__RCSID("$NetBSD: subr.c,v 1.20 2022/04/07 19:33:38 andvar Exp $");
 #endif /* not lint */
 
 #include <ctype.h>
@@ -111,7 +111,7 @@ position(const char *string, char ch)
 }
 
 /*
- * clobber the first occurance of ch in string by the new character
+ * clobber the first occurrence of ch in string by the new character
  */
 char *
 substitute(char *string, char chold, char chnew)
diff --git a/usr.bin/extattr/getextattr.c b/usr.bin/extattr/getextattr.c
index 7c407d4a1c2a..1915765d989d 100644
--- a/usr.bin/extattr/getextattr.c
+++ b/usr.bin/extattr/getextattr.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: getextattr.c,v 1.12 2014/06/20 15:22:01 manu Exp $	*/
+/*	$NetBSD: getextattr.c,v 1.13 2022/04/07 19:33:38 andvar Exp $	*/
 
 /*-
  * Copyright (c) 2002, 2003 Networks Associates Technology, Inc.
@@ -258,7 +258,7 @@ main(int argc, char *argv[])
 		argc--; argv++;
 	} else {
 		/*
-		 * The namespace was not valid. Perhaps it was omited.
+		 * The namespace was not valid. Perhaps it was omitted.
 		 * Try to guess a missing namespace by using
 		 * linux layout "namespace.attribute". While
 		 * we are here, also test the Linux namespaces.
diff --git a/usr.sbin/ldpd/mpls_routes.c b/usr.sbin/ldpd/mpls_routes.c
index 88130428689b..b0f1f08754d1 100644
--- a/usr.sbin/ldpd/mpls_routes.c
+++ b/usr.sbin/ldpd/mpls_routes.c
@@ -1,4 +1,4 @@
-/* $NetBSD: mpls_routes.c,v 1.24 2016/04/04 07:37:08 ozaki-r Exp $ */
+/* $NetBSD: mpls_routes.c,v 1.25 2022/04/07 19:33:38 andvar Exp $ */
 
 /*-
  * Copyright (c) 2010 The NetBSD Foundation, Inc.
@@ -864,7 +864,7 @@ bind_current_routes()
 
 		/*
 		 * This function is called only at startup, so use
-		 * this ocassion to delete all MPLS routes
+		 * this occasion to delete all MPLS routes
 		 */
 		if (so_dst->sa.sa_family == AF_MPLS) {
 			delete_route(so_dst, NULL, NO_FREESO);
diff --git a/usr.sbin/sysinst/arch/mac68k/md.c b/usr.sbin/sysinst/arch/mac68k/md.c
index 95ad1ccf4475..9695e52eb2c3 100644
--- a/usr.sbin/sysinst/arch/mac68k/md.c
+++ b/usr.sbin/sysinst/arch/mac68k/md.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: md.c,v 1.11 2022/01/29 16:01:19 martin Exp $ */
+/*	$NetBSD: md.c,v 1.12 2022/04/07 19:33:38 andvar Exp $ */
 
 /*
  * Copyright 1997 Piermont Information Systems Inc.
@@ -782,7 +782,7 @@ getName(part, len_name, name)
 }
 
 /*
- * Find the first occurance of a Standard Type partition and
+ * Find the first occurrence of a Standard Type partition and
  *  mark it for use along with the default mount slot.
  */
 static int