diff --git a/.gitignore b/.gitignore
index d05758b..6a6b992 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,13 @@
 
 # Python leaves these beside the test scripts.
 __pycache__/
+
+# Assembled programs. Every one of these is built by 'make' in Programs/ from a source
+# file that is tracked, so committing them only creates a second answer to the question of
+# what a program does - and the second answer goes stale silently. Nine of the ten that
+# used to be here disagreed with their own source, including the operating system.
+#
+# Not anchored, because a .bin may be built anywhere a .asm lives.
+*.bin
+*.sbx
+*.img
diff --git a/Programs/16bitFibonacci.bin b/Programs/16bitFibonacci.bin
deleted file mode 100644
index 6282bac..0000000
Binary files a/Programs/16bitFibonacci.bin and /dev/null differ
diff --git a/Programs/16bitSegmentedSieve.bin b/Programs/16bitSegmentedSieve.bin
deleted file mode 100644
index ace554c..0000000
Binary files a/Programs/16bitSegmentedSieve.bin and /dev/null differ
diff --git a/Programs/16x16Life.bin b/Programs/16x16Life.bin
deleted file mode 100644
index 9f4f7c6..0000000
Binary files a/Programs/16x16Life.bin and /dev/null differ
diff --git a/Programs/32bitFibonacci.bin b/Programs/32bitFibonacci.bin
deleted file mode 100644
index 00ea154..0000000
Binary files a/Programs/32bitFibonacci.bin and /dev/null differ
diff --git a/Programs/8bitFibonacci.bin b/Programs/8bitFibonacci.bin
deleted file mode 100644
index 77dc8b5..0000000
Binary files a/Programs/8bitFibonacci.bin and /dev/null differ
diff --git a/Programs/CosmOS/Bin/cosmos.bin b/Programs/CosmOS/Bin/cosmos.bin
deleted file mode 100644
index 1d658bb..0000000
Binary files a/Programs/CosmOS/Bin/cosmos.bin and /dev/null differ
diff --git a/Programs/CosmOS/Bin/disk.img b/Programs/CosmOS/Bin/disk.img
deleted file mode 100644
index 0d72b1b..0000000
Binary files a/Programs/CosmOS/Bin/disk.img and /dev/null differ
diff --git a/Programs/CosmOS/Bin/hello.txt b/Programs/CosmOS/Bin/hello.txt
deleted file mode 100644
index f26c4fb..0000000
--- a/Programs/CosmOS/Bin/hello.txt
+++ /dev/null
@@ -1 +0,0 @@
-Hello, SplitBit!
diff --git a/Programs/Libraries/int16print.bin b/Programs/Libraries/int16print.bin
deleted file mode 100644
index 9c651ac..0000000
Binary files a/Programs/Libraries/int16print.bin and /dev/null differ
diff --git a/Programs/hello.bin b/Programs/hello.bin
deleted file mode 100644
index 28cc8c4..0000000
Binary files a/Programs/hello.bin and /dev/null differ
diff --git a/Programs/primeSieve/8bitSieve.bin b/Programs/primeSieve/8bitSieve.bin
deleted file mode 100644
index e36da67..0000000
Binary files a/Programs/primeSieve/8bitSieve.bin and /dev/null differ
diff --git a/Programs/printHello.bin b/Programs/printHello.bin
deleted file mode 100644
index f8d640a..0000000
Binary files a/Programs/printHello.bin and /dev/null differ
diff --git a/Programs/replCalculator.bin b/Programs/replCalculator.bin
deleted file mode 100644
index 4d89b0f..0000000
Binary files a/Programs/replCalculator.bin and /dev/null differ