Dell Vostro

Dell Vostro is a line of business-oriented laptop and desktop computers manufactured by Dell aimed at small businesses. From 2013–2015, the line was temporarily discontinued on some Dell websites but continued to be offered in other markets, such as Malaysia and India.
Prior to Vostros, Dell's home and small business computers were sold under the same lines: Dimension for home and small business desktops, and Inspiron for home and small business portables. With the introduction of Vostro, the Dimension line was discontinued, and the Inspiron line changed to include all computers for the home market; regardless of form factor. One marked difference between the Inspiron line and the Vostro line is that the Vostro line is cheaper but comes with shorter technical availability.
Temporary discontinuation.
In July 2013, Dell announced that they would stop manufacturing all Dell Vostro systems. Select models were made available on various Dell outlet channels for a limited time. The discontinuation of Vostro models was reportedly because of changing technology and lesser demand in the corporate world. Subsequently, the Vostro was resurrected onto the market in early 2015.
Current laptops line.
The current lineup of Vostro laptops includes Vostro 3000 series that was released on March 9, 2010, Vostro 14 5000 series that was released on October 13, 2015 and Vostro 15 5000 series released on January 20, 2017.
Please note that this list may be incomplete and some of the models that are currently being offered in some markets may be missing.
Vostro 3000.
Vostro 15 (35##).
The Vostro 15 3000 is a laptop line with a 15-inch display aimed at small and medium business. It is an affordable version of the 5000 15-inch line.
3558 — is a model with a 15.6 inch HD display with anti-glare aimed at small business. The operating system options are the ones offered with the Vostro 3368.
3578 —
Vostro 5000.
Vostro 13 (53##).
5370 — 
Vostro 14 (54##).
The Vostro 14 5000 is a laptop with a 14-inch display aimed at small business. 
5459 — Operating system options are Ubuntu or Windows (8.1 and 10), and it is compatible with Windows 7. The starting price is $550.
This laptop has since been updated with Intel's Kaby Lake, Kaby Lake R and Whisky Lake processors. 
5471 — 
5481 — Sept. 2018 with a starting price of $670.
5491 —
Vostro 15 (55##).
5568 — features Intel Kaby Lake microprocessors
5581 — Sept. 2018, starting price is $580.
Vostro 17 (57##).
5770 —
Discontinued laptops.
Vostro 1000.
The Vostro 1000 is Dell's 15.4" business laptop using AMD's Socket S1 processors.
Vostro 1220.
The Vostro 1220 is Dell's 12.1" business laptop based on the Intel Montevina platform.
Vostro 1320.
The Vostro 1320 is Dell's 13.3" business laptop based on the Montevina platform.
Vostro 1500.
The Vostro 1500 is Dell's 15.4" business laptop based on the Montevina platform. The design is based on Inspiron 1520 with a black finish.
Vostro 1720.
The Vostro 1720 is Dell's 17" business laptop based on the Montevina platform. Note: X9000/X9100 may run very hot and not recommended. T9800 CPU recommended when equipped with nVidia GPU (Average CPU temp 85°C-89°C under load).
Vostro A90 and A90n.
The Vostro A90 is Dell's 8.9" business netbook with similar platform as Dell Mini 9. The A90n offers Ubuntu Linux while the A90 offers Windows XP.
Vostro V13.
The Vostro V13 is Dell's 13.3" business ultraportable with targeted at consumers looking for a budget business ultraportable. The Vostro V13 has a chassis design similar to the Dell Adamo, but it is very cheap at $449, though it ships with Ubuntu and clocks in at a 1.4 GHz Intel solo processor. The processor in the V13 cannot be customized, but the memory can. The base configuration ships with Ubuntu Linux version 9.04, but higher-end configurations ship with Windows 7.
Vostro 3300.
The Vostro 3300 is a laptop with a 13.3 inch widescreen display aimed at small business. Dell offers an Intel Core i3 or i5 processor with up to 6 GB DDR3 RAM. The chassis is made of aluminum. The operating system installed is Windows 7 32-bit/64-bit with an XP downgrade as an option. Discrete graphics is an option, and pricing starts at $599. This model has been discontinued by Dell.
Vostro 3400.
The Vostro 3400 is a laptop with a 14-inch display aimed at small business. It offers updated Core i processors and larger batteries. Pricing starts at $549. Operating system options are the ones offered with the Vostro 3300.
Vostro 3500.
The Vostro 3500 is a laptop with a 15.6 inch display aimed at small business. Operating system options are the ones offered with the Vostro 3300. In some countries Ubuntu can be chosen as the operating system. Vostro 3500 production is discontinued.
Vostro 3550.
The Vostro 3550 is a laptop with a 15.6 inch display aimed at small business. Operating system options are the same as those offered with the Vostro 3350.
Vostro 3560.
The Vostro 3560 is Dell's 15.6" business notebook.
Vostro 3700.
The Vostro 3700 is a laptop with a 17.3 inch display aimed at small business. Pricing starts at $629. An Intel Core i7 processor is an option on the Vostro 3700, the only Vostro 3000 series laptop to offer this processor. Operating system options are the same as those offered with the Vostro 3300.