diff --git a/book/src/fullnode.md b/book/src/fullnode.md
index d35e0bc3f6..d53e7a0acd 100644
--- a/book/src/fullnode.md
+++ b/book/src/fullnode.md
@@ -22,8 +22,8 @@ consistently complete a load at the rate of the slowest stage in the pipeline.
 ## Pipelining in the Fullnode
 
 The fullnode contains two pipelined processes, one used in leader mode called
-the Tpu and one used in validator mode called the Tvu. In both cases, the
+the TPU and one used in validator mode called the TVU. In both cases, the
 hardware being pipelined is the same, the network input, the GPU cards, the CPU
 cores, writes to disk, and the network output.  What it does with that hardware
-is different.  The Tpu exists to create ledger entries whereas the Tvu exists
+is different.  The TPU exists to create ledger entries whereas the TVU exists
 to validate them.