Ulysses' logs

 is a series of six holodisk in the Fallout: New Vegas add-on Lonesome Road.

Transcript
Ulysses Log Y-17.16

Ulysses Log Y-17.17

Ulysses Log Y-17.21

Ulysses Log Y-17.22

Ulysses Log Y-17.23

Locations

 * Ulysses Log Y-17.16 - In The Crows' Nest, inside the top of the ruined buildings next to a bedroll.
 * Ulysses Log Y-17.17 - West of Sunstone Tower Roof, after detonating the warhead to progress in the DLC, turn to your right, you should see the roof of a building next to what looks like a series of apartment complexes. The roof in question has a hole in the side of it and a white Old World Flag on the roof. The log is inside of the hole, at the very end, underneath a matress.
 * Ulysses Log Y-17.21 - Directly south of the Collapsed Overpass Tunnel Entrance. Behind a hard locked gate.
 * Ulysses Log Y-17.22 - Just beyond the High Road, once you reach the end, you should see a truck sticking out underneath an overpass. Jump up the rocks to get to the truck, turn right. You should see smoke from a campfire. The holotape is directly south of the campfire, leaning against a rock wall.
 * Ulysses Log Y-17.23 - Located just outside of Sunstone Tower Roof, from the entrance, head down the side of the building, descending the fallen structure hanging off the side of the building, at the bottom, go inside of the building and traverse another section of fallen structure. The holotape is on a desk in from of an average locked wall safe.