China 
Africa 
- Bandsaw
- Bandwidth
- Bandwidth allocation
- Bandwidth extension
- Bank
- Bank erosion
- Bank filtration
- Banker's algorithm
- Banknote
- Banner blindness
- Bar chart
- Bar stock
- Barbecue
- Barbed wire
- Barbier reaction
- Barbituric acid
- Barchan
- Barcode reader
- Barcode scanners
- Barcode systems
- Barcodes
- Bare metal
- Bare-metal stents
- Barefoot
- Bargaining
- Bargaining power
- Barges
- Bariatric
- Bariatric surgery
- Barite
- Barium
- Barium borate
- Barium chloride
- Barium chromate
- Barium ferrite
- Barium fluoride
- Barium hydroxide
- Barium nitrate
- Barium oxide
- Barium peroxide
- Barium sulfate
- Barium swallow
- Barium titanate
- Barker code
- Barkhausen Effect
- Barometers
- Barometric altimeter
- Baroreceptors
- Baroreflex
- Barostat
- Barotrauma
- Barotropic fluid
- Barrel
- Barrel chest
- Barrel cortex
- Barrel of oil equivalent
- Barrel shifter
- Barren
- Barrer
- Barrier function
- Barrier islands
- Barriers
- Barthel Index
- Bartlett's test
- Barycenter
- Barycentric coordinate system
- Barycentric coordinates
- Barycentric dynamical time
- Baryon number
- Baryte
- Basal cell carcinoma
- Basal forebrain
- Basal lamina
- Basal-cell carcinoma
- Basalt
- Basalt fiber
- Basaltic andesite
- Basanite
- Base address
- Base bleed
- Base calling
- Base conditions
- Base course
- Base excess
- Base flow
- Base isolation
- Base level
- Base load
- Base metals
- Base of skull
- Base oil
- Base pairs
- Base rate
- Base tunnel
- Base units
- Base-rich
- Baseband
- Baseband processor
- Baseflow
- Baseline
- Basement
- Basement membrane
- Bash
- Basic blocks
- Basic feasible solution
- Basic oxides
- Basic oxygen steelmaking
- Basic reproduction number
- Basilar artery
- Basilar membrane
- Basilar skull fracture
- Basilic
- Basis
- Basis functions
- Basis pursuit
- Basis pursuit denoising
- Basis set
- Baskets
- Basophilic
- Basophils
- Bass Diffusion Model
- Bassanite
- Bast fibers
- Bastions
- Bat algorithm
- Batch
- Batch effects
- Batch normalization
- Batch processing
- Batch production
- Batch reactor
- Bateman equation
- Bathochromic shift
- Batholiths
- Bathtub curve
- Bathymetry
- Batik
- Bating
- Battens
- Battery
- Battery balancing
- Battery electric
- Battery electric buses
- Battery pack
- Battery recycling
- Battery simulator
- Battery swapping
- Baud
- Bauxite
- Bax