diff --git a/src/tvu.rs b/src/tvu.rs
index 1f1d76b8a..28e360629 100644
--- a/src/tvu.rs
+++ b/src/tvu.rs
@@ -1,24 +1,51 @@
 //! The `tvu` module implements the Transaction Validation Unit, a
-//! 5-stage transaction validation pipeline in software.
-//! 1. streamer
-//! - Incoming blobs are picked up from the replicate socket.
-//! 2. verifier
-//! - TODO Blobs are sent to the GPU, and while the memory is there the PoH stream is verified
-//! along with the ecdsa signature for the blob and each signature in all the transactions.  Blobs
-//! with errors are dropped, or marked for slashing.
-//! 3.a retransmit
-//! - Blobs originating from the parent (leader, at the moment, is the only parent), are retransmit to all the
-//! peers in the crdt.  Peers is everyone who is not me or the leader that has a known replicate
-//! address.
-//! 3.b window
-//! - Verified blobs are placed into a window, indexed by the counter set by the leader.sockets. This could
-//! be the PoH counter if its monotonically increasing in each blob.  Erasure coding is used to
-//! recover any missing packets, and requests are made at random to peers and parents to retransmit
-//! a missing packet.
-//! 4. accountant
-//! - Contigous blobs are sent to the accountant for processing transactions
-//! 5. validator
-//! - TODO Validation messages are sent back to the leader
+//! 3-stage transaction validation pipeline in software.
+//!
+//! ```text
+//!            .----------------------------------------.
+//!            |  TVU                                   |
+//!            |                                        |
+//!            |                                        |
+//!            |                                        |
+//!            |                                        |
+//!            |  .-------.  .--------.  .-----------.  |
+//! .--------. |  | Blob  |  | Window |  | Replicate |  |  .------------.
+//! | Leader |--->| Fetch |->| Stage  |->|  Stage    |---->| Validators |
+//! `--------` |  | Stage |  |        |  |           |  |  `------------`
+//!            |  `-------`  `----+---`  `----+------`  |
+//!            |                  |           |         |
+//!            |                  |           |         |
+//!            |                  |           |         |
+//!            |                  |           |         |
+//!            `------------------|-----------|---------`
+//!                               |           |
+//!                               v           v
+//!                          .--------.    .------.
+//!                          | Window |    | Bank |
+//!                          `--------`    `------`
+//! ```
+//
+// TODO: @aeyakovenko, these comments no longer refect the code in this module:
+// 1. streamer
+// - Incoming blobs are picked up from the replicate socket.
+// 2. verifier
+// - TODO Blobs are sent to the GPU, and while the memory is there the PoH stream is verified
+// along with the ecdsa signature for the blob and each signature in all the transactions.  Blobs
+// with errors are dropped, or marked for slashing.
+// 3.a retransmit
+// - Blobs originating from the parent (leader, at the moment, is the only parent), are retransmit to all the
+// peers in the crdt.  Peers is everyone who is not me or the leader that has a known replicate
+// address.
+// 3.b window
+// - Verified blobs are placed into a window, indexed by the counter set by the leader.sockets. This could
+// be the PoH counter if its monotonically increasing in each blob.  Erasure coding is used to
+// recover any missing packets, and requests are made at random to peers and parents to retransmit
+// a missing packet.
+// 4. accountant
+// - Contigous blobs are sent to the accountant for processing transactions
+// 5. validator
+// - TODO Validation messages are sent back to the leader
+//
 
 use bank::Bank;
 use blob_fetch_stage::BlobFetchStage;